Things are definitely better then It was yesterday, I have a question though, If this is indeed a spam attack, anybody could do it? or this require money and resources to do? curious how It's done but If it require money, I believe big whales are behind it.
i am no expert but some things (i think) are obvious. for example the transactions need to be paying higher fees or they would be useless. so each paying 200-300 satoshi per byte.
only useless to real user. spammer doesnt need to pay anywhere near that cost. they can put absolute minimum that would be relayed whatever that is (no fee?) im not sure
if there are 1 million transactions paying 10 satoshi per byte i pay 20 satoshi per byte and i will have priority over all of the 1 million spam transctions so miners will pick my tx.
they spam to take the space in the block (fill it up) not to take the space in the memory pool. and to take the block you need to have higher priority hence the higher fee.
You would think, but not so.
Bitfury still fill blocks with low fee spam from addy 3QQB6AWxaga6wTs6Xwq8FYppgrGinGu15f before higher fee paying real tx's.
See for example
https://blockchain.info/block-index/1477998Addy
https://blockchain.info/address/3QQB6AWxaga6wTs6Xwq8FYppgrGinGu15f has sent 140238tx's, all spam, nearly all relayed by Bitfury.
3QQB6AWxaga6wTs6Xwq8FYppgrGinGu15f paying to 3QQB6AWxaga6wTs6Xwq8FYppgrGinGu15f - Bitfury did the spamming?