https://github.com/GAWMiners/paycoin/blob/master/src/main.cppAbove is the link to that actual source code for Paycoin (XPY) used for this post.
Lines 963-972:
if (primeNodeRate == 0)
nRewardCoinYear = 5 * CENT;
else if (primeNodeRate == 10)
nRewardCoinYear = 10 * CENT;
else if (primeNodeRate == 20)
nRewardCoinYear = 20 * CENT;
else if (primeNodeRate == 100)
nRewardCoinYear = 100 * CENT;
else if (primeNodeRate == 350)
nRewardCoinYear = 350 * CENT;
Lines 1364-1400 (34 pub keys)
if (!vout[0].IsEmpty() && vout[0].scriptPubKey[0] == OP_PRIMENODE350){
std::vector pubKeyList;
pubKeyList.push_back("0427096f2e3123970010d97a1f0e210499435482927b12b1d6a209f0c383e03b444a244e372cad494c144b47ac3686fc4feea2aec2df3ba77f41cc27dbf8f3c4ff");
pubKeyList.push_back("04d96b945eca3ea23e1dfd414d2a4772c66e6c7297d0d4f88b7a3b7c285931c36f16ef26299704d49bda770621d9145d96365e02380b4329aceafe7b81012bef48");
pubKeyList.push_back("040057901e3de5e6429912047c2b5175dde2586b981397a0e434d43accf2e49c108fb3361b3957fcbbfa39930d50aeff56c690e91ffb2d953eefa46aa50fcb6917");
pubKeyList.push_back("0486022d6dd5c8d17c411cf28add879e5c738b64090e83a43cca1699ececdb8f3524379aa71bb76a2af2d7e8294c9d7b8179d98215afe589c921e4507f63c5c802");
pubKeyList.push_back("0436639ad108f7630881fb3af5f540ded3bb4653dab695f1716e71ea5838bcee7c238fa624bc2f1bfe0990cea4c3ee3e9f949bbc61e347b5887815eb51468b5c88");
pubKeyList.push_back("04d04183c8caad2f41edffbabd5b6a266e886457ef0621283b3418979d841bc2425e6b273ce0ea2b461b9797a7d3edd74a4407af9995a9702018cf69df8eee6aba");
pubKeyList.push_back("04a8b4a8c55361f37cad732da49b2bccadb9be522dd84f9c2329a7dbfaac8c5dd093b803d791719c413196694c97fcb360b7935034dcc4b1b3c2e45a39e67b8dd6");
pubKeyList.push_back("04b7930cd8bda83097841cfa0a2b5317ecc029a512bbf056a130421ee500773f16850f74e2cbffa4e8aa2a0b0a25009ea619e49839e8608db4469de285d6ee781d");
pubKeyList.push_back("04d0e3e0e688659d07d4510e25a9884c12931e581b8a2bcdd8ad6c4362ae219b08089761e88e17109aa6618dfca152f854e880ca66414d7f8e5d1d95e70dc95dee");
pubKeyList.push_back("04025f944a31226086da4f0f49188bfe12d29a304986d909b00560a5f8c84c09ab0f6d0e16926d42a07eaa522dad74404ef25ca863fbd78d45ecdb6da282caf9da");
pubKeyList.push_back("04983ebed643535907ebbea93387ca38c262778d21dab385f0d0c5dc49b66ebe54c27d9e318ea2798800a067dc3ad8e414684d477e7633f261b08522a0f81b3c5e");
pubKeyList.push_back("04512b7f555a89e73cd1f9d5138d8e46b81c49a184e0cb7b538167e046dea93689101f076c59874c085642b33b2ad58ff1dee34ffa1d03880c0272686291bd64b5");
pubKeyList.push_back("045f46a60dd9c3c3e68a127aee68a4ad59d303f9cfe91e2015156fe25a42687855a6de4ccb53756f06e7c3cf66e295fd84d8c3c0fd73c7cee44966aaae3d033652");
pubKeyList.push_back("049a0e427b86663cc928d6475d0e591fd6dbaf686e2b6a140e79e646fbaa0c88481984f61de390c9fc73c9f58d2c26bd8bdadbdd400a8cc96b4d7a6f52fbe1209d");
pubKeyList.push_back("040da5d570e39531f25ae747a1698d67470c0d7fb4941f104d081235f7425cefb95b5eca24daf80a732cb267bd13d47b62ce4102394c180b2a792216f4a087d320");
pubKeyList.push_back("04672dbddcb26bc82028652a5ff042f98c5c5f58f7330d49ad4a22268f9a93e2cca8ce2ed7a93012b83903f4ddcef5f1a0ea5fb90df3ae38528489d9b69cd0dd39");
pubKeyList.push_back("04fb8a251640f766ec63aee35f74f49e46b5ae7f61f7bcabe6103d13ab56086c884c525b96e10741704a3c44982aa9c6577184f0259a36f18e4ca8325ff2cd8330");
pubKeyList.push_back("04f9644ebc672e382eb45a82e221f2ab9d5124fea1de7de2d417c863ddd760c5c778f8fe39e09e7937ac99172a3a9d0b013020c1256b935da171b66864a1e16b9c");
pubKeyList.push_back("048a58fe8de7c123f6f816667fb1bfe6d99b9f0ac415bde1fdf4e9725fc80d2699c30b362faf992cd00edb586df9f459081c3f586becbabdd33bdd8becf31f85c2");
pubKeyList.push_back("0475a43388b6023722d93c03128541b3877153736a9ac7f48bf1d1a37e46aa1381a450aa0a6c40e2f4e317a4212c37c18bd1cf99ea3f70ecec83c30f4ceca65201");
pubKeyList.push_back("04bf85a4920b6fb89868fac40c4917af40546867221f2da2de84b9a9f26c569cee689c2eafe0c911c31ac88d9005badb8f32fb0650ffe2e272194ef5df162b35ac");
pubKeyList.push_back("04e75eda3a94f74d684a7239b8c6cc056e75fba2690888855f81810c439270265f4c3c46c3aedfaff81da2dfb236e091cc36b5759e6a0513898ad443cf91ff6631");
pubKeyList.push_back("04c62eb46a011e45f0069d8881894ac22889988b384ba7234c5caeed42d4f11d16e2ba0b55198cec0a0a710714d0602e1ccaada5284ae07fa0ae43b0cb1e7d59b1");
pubKeyList.push_back("043d60413953d4a9e144d86390c8ddb51b674df65ce1a05a26e400b3bc27cbc55c6c6b05d5030e60dfe59101dc9614e4298c33716be751feb0d494a788e00ad627");
pubKeyList.push_back("041c10a07fa1799e8d43d4a0b74b89614722fabcfd90dac380d170ebfddd0b5f0462e67c0704172cbe925c77c1890af68000d44fed56d628cceea6101fcaf74d38");
pubKeyList.push_back("04640a129ecf82ed28875881c28f59bf46b82aba8e8be77ad39bb1dd0ffd7944f49da4dc3de9cac50d88763167583b030d7df0e234e8a6e9de725aa337fcb1f0ed");
pubKeyList.push_back("04e5cba6da1d31076d42db494613e6c8587ba4252693c8d8dbcdae033479e8cab10921c147b91127ef4b36d0209a8de917f3c51fd231b07acdcce47d0ac3a14de8");
pubKeyList.push_back("0479502526431508d1edcb054bfb49dfed971e144ff1d3d89384f1af8c95a2ee3d6f296cade67c2dfb8c43b324ed6cc079395a5ec4118f0b8c5737fe8988d4ecfc");
pubKeyList.push_back("04048059da03e2ecca976fb0c8e8ea408ea3a8e2b45c55c9ee095011077ded701f9b8639b265e1dc1eb0ac08f990f67b99da03f4bb5c68bef182488d49f5e27762");
pubKeyList.push_back("04f3b1f9c8b07034eb3f7f609d150561ee4ae05a1051816060974221f5c36a1e3db4b79b46146da9bae303648dbf94bf740ad41d6e3297eeae6829bd2d9f3e3a5e");
pubKeyList.push_back("048f400e748d54d8fdf148a270adcb7aa4b73c9d49f3c8bbdf57df6a8a349c54abaae8e223bab43cb1770e8a80c00cb11904e301f32ea0aeec5d59ce8a9b9dc5c1");
pubKeyList.push_back("04cf206b074a8da673f6b06cdbd28b82253ef4b4aeb6689745bf9e42a5d9007269b18a3ba5becfabb3a2d5f7b4e84ad9f6d6283856fc315ddf4fd8e5797a4d8be7");
pubKeyList.push_back("04ae324ce3d313a42a76ec17f09625185c53bfa99c5f06920105291bea676220203d3f1b7c0de605c2bbcaa760a632f5b9a55dd86d8f36b6b985932d61a9a88946");
pubKeyList.push_back("040ba9aeeff11561fa33827d17957fc40ed5b1b8d260140535e0350ba431609abf3a31166a9e014d26553520f59de730dbcf5944fb433d1abfadb3f4f30668ab48");
pubKeyList.push_back("0416683a0796c3dfda8065c6011a61747488345bf0a0f559836104b4e9074e6c40b206797850603862baac60ba61bea930db1f2b4362c117d54472dc2a8b93bbd4");
Lines 1424-1435 (10 pub keys)
}else if (!vout[0].IsEmpty() && vout[0].scriptPubKey[0] == OP_PRIMENODE100){
std::vector pubKeyList;
pubKeyList.push_back("046ebc739ff7d6a0dbb3ae9bb9260a17b9d2fc40ca77d9c018784834ef863414c17b4fd3a580d9721ec0ee12c823f1eb48821b8135cd32aee26ba3be9cb22f7a31");
pubKeyList.push_back("04ffcd9e3acffbd40d6472f354e76f03a5c806623a5fbe341796b92e71ad59f5c4a4ad5f04c4fe7d6e50f6546d361a06020f8670eae020e8a7a1d036155e75d10a");
pubKeyList.push_back("04a61c5b67927c4a0389baa1089a87a93d60fbf15cc345823097245d0c331525d273a03544720f3a4e8f9afb443793f3ea595d5f0af7e17d764385750a9eb54d19");
pubKeyList.push_back("04f9f78f1dcdb6f76ba0a962aba3058a605691e2ecd63e16b5e0e39d19c5821f8eda421d06b4bf1159bcee989f01b273a4337ba0bc9fc749ef35c32e6e4a7bc1e9");
pubKeyList.push_back("0444b7d2aa1b9c74710325735df89692d1fa686a3a67d95462cbf4cb0d8f47eb9ac18da92bcce99b58e1be020c36736d9a1f85fa191c2ddcc779c53c4ede7c73b9");
pubKeyList.push_back("0426bbbd25a4dc0a295b64d4f1d3787d39cba04534109cd145c5229a8cc3285d097462131dd6fa1968eb510d53fee8a012250390ef6149c2003784f5585fef97a2");
pubKeyList.push_back("04ab438d669c7ed7db2e0eef61bd7ae4937ac32347d39adfb204f4d6e4e2a5adfa4548f69dc4cdc2ff3da0506e9382f69175138163328d445f110081dfa5d5d416");
pubKeyList.push_back("04406932519cd5e47333a049922eb8bcddc6b722c31440f36ca2851e119314b375914b08c635837e47c7cbf6ace95acbadee62acb054551bc4255c81d03c485e95");
pubKeyList.push_back("0454d677fbe06d5f56920db9bd124015edfd1fb32786c88a1a15cf0a84204d4386bd48fb31239eb3e594b13ca952b3c5f25aca9f3f702ad5b0120160dc355a6fbd");
pubKeyList.push_back("0452f030183dffd2b53d639b16488bd451ba2dc9d1791464300f28abf5414036530735b6a8de119443e3875f2e67514b6b2678ed3966629d354e6aabdb8251ed19");
Lines 1459-1462 (2 pub keys)
}else if (!vout[0].IsEmpty() && vout[0].scriptPubKey[0] == OP_PRIMENODE20){
std::vector pubKeyList;
pubKeyList.push_back("04ce27308191e2e0274459bb191ba2cb93ef4dc8a838e8e8310083fcf7e2be9c7c20b3b15e2dc2a1482275ee55138c2350771231b00d7740e1e495269987faa24b");
pubKeyList.push_back("04311cc5333eeadbb3b18f6c70832df159796b1872bfa66bf214030ced65f8a33c4c6b4da48ffebb111a09129b337c9ed5129256995a4fa315fab3b81666cf2bad");
Lines 1487-1491 (3 pub keys)
}else if (!vout[0].IsEmpty() && vout[0].scriptPubKey[0] == OP_PRIMENODE10){
std::vector pubKeyList;
pubKeyList.push_back("0428588850c9361e7f5848807ef40ac839d5cd664db6183cbc53f63b0e8682a5b4b6caa6782db2b314e3cab43503f05df280b9e98e82b2235a00e4dd24997b49a0");
pubKeyList.push_back("04bf2832da17137215912a1173b3ad2675e1b03c4df22bb93f2f2fdb92bdd0097e0a267d8813799fe335d1b80ff23fa48809dea4517211b48eacadc85147d5c643");
pubKeyList.push_back("04c8ad33bb094d7bee52ec9d08e4eea8ef33d49c1d871e6a4ee56f2fd6f44bb87a28a903bf1306cd855c4fa19baa42d604e2f6aa571b4a6a603ab7769162e7fcb8");
What does this mean? Well.. it means that there are 34 pub keys associated with "prime nodes" which stake @ 350%/yr. Yes... that isn't a typo. Prime nodes have a minimum quantity of 125,000 XPY and, for ease of calculation and playing it conservatively, we'll assume all address have this amount.
So... according to
https://chainz.cryptoid.info/xpy/#!rich there are 51 prime address. Since there are 49 pub keys associated with higher than 5% staking rates we have to assume, and have found to be the case at least according to the richlist, 4 addresses will stake at 5% like the rest of the plebs (balances found below in edit).
125,000(.05)(4)+125,000(.1)(3)+125,000(.2)(2)+125,000(1)(10)+125,000(3.5)(34) =
25,000+37,500+50,000+1,250,000+14,875,000= 16,237,500
So that's an additional, after one year, 16 million two hundred thirty seven thousand five hundred coins just from the "Prime Nodes" in additional coins added to the blockchain. That does not take into account anything else except the "Prime Nodes".
Hyperinflation will take care of this coin on it's own.