What's weird is I can't find bitvalak's entry in the bounty thread. Nor is he anywhere in the Telegram.
It does look like perhaps he was added as a special favor or something.
Thing is, the way bounty campaigns work, you don't even have to provide your own links to end up in spreadsheet. Just look at this Google form from one campaign. I can use your bitcointalk profile, someone else's twitter and all that data will end up in spreadsheet. It is up to bounty manager to sort those, but they are often paid in those useless shitcoins so they don't really care about that stuff and don't check properly.
You can put whatever you want in there really, and its being abused all the time. Proper way it would be to check whether proof of post participation matches submission, and if not, remove it. But that means extra work.
I went through spreadsheet a bit, and I found one more case. This time scammer used name of one fellow member from Croatian board. His name is there, twitter account is from someone else and ETH address hasn't been used before. There must be more cases for sure, that was just the name i recognized.