Keep in mind anyone can put data on the spreadsheet if they don't post on the forum is hard to prove who is the owner of the account.
You need to open the profile link on the forum search on their post history and see if they are really the owners or if someone is hijacking their accounts.
They have proof of authentication posts and numbers in the spreadsheet and same in the bounty thread. Seen a few hijacked accounts too
then somethings you have to track the personal wallet used on the project to know if the person was actually the rightful own of the work as most of the bounty managers do asked participants to fill out their wallet at the end side of the article to prove the rightful owner or authorship.