Interesting , it seems we've been looking at the same person.... However, here's what I found:

Accounts Connected:

J_Dubbs
Sumo
Fattyforhire
Dasdo
Urbinklin
Ranggawulung
Xtra_Coin


Proof:

J_Dubbs

uses this ETH address

in Crypterium campaign
Spreadsheet: https://docs.google.com/spreadsheets/d/17vEvLXZh8_g03LMiF9vqgt94ve5SURuqBv9YW-t5HAQ/edit#gid=1758406315
#498 - #501

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Sumo

uses the same ETH address

in Debitum campaign
Spreadsheet: https://docs.google.com/spreadsheets/d/1TkIkv4i9RBzg0c1HmPr4fwYTFqPnLNx6z5eP6mgazNQ/edit#gid=1326654035
Signature: #39 blog: #1900

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I think it's okay if you have more than one account as long as you don't use them in the same campaign... So here where it gets interesting

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Fattyforhire
Dasdo

uses the same ETH address

in Bankex campaign
Spreadsheet: https://docs.google.com/spreadsheets/d/1VkMx3R1yYniFD6QbP9P6tO3qzD75vtcZ_AkUOcq2hm0/edit#gid=400854254

where you find Fattyforhire in Facebook section #193  and Dasdo in Telegram #137

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again Fattyforhire join a campaign with his alt Urbinklin

uses the same ETH address

in GBX campaign
https://docs.google.com/spreadsheets/d/134Y9O1a2uBuet8n83RVUUHvL9Om0k1FfgVWSZCPH_v0/edit#gid=82987113

where you find Fattyforhire in Telegram - Accepted #10  and Urbinklin in signature #71

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Ranggawulung
Xtra_Coin

uses the same ETH address

in Aigang campaign
https://docs.google.com/spreadsheets/d/1zjdy-Xo2V49ymXOQvvDu-B3Xv_JK8xuJJ7wnFEWhDsc/edit#gid=1133936861

where you find Ranggawulung in Signature section #11  and Xtra_Coin in signature #39

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Another
Proof:

Sumo now participating in The Deal Coin campaign
spreadsheet: https://docs.google.com/spreadsheets/d/1fDKeYNmEwN6-JCUdZfx6s-6Am7XHIt5skkWxePuwGg8/edit#gid=1736679172

Signature campaign #28 and he uses a different ETH address

However, here's a transaction between Sumo's new ETH address and his alts ETH address - TX hash:

https://etherscan.io/tx/0x0d375f94de5e346d894f565ce47e6d060419b941528af6c71c84f6214ae78c4e

+

Merit farming between
Sumo
Fattyforhire
Urbinklin




Miscellaneous:
Same person using at least 7 accounts and using some to apply for the same bounty + giving merit to his alt