Bro, these people are getting smarter. They do not use the same wallet anymore. They know how to avoid these things. Now, they create a dedicated exchange account for each account so they don't end up sending payments to the same exchange account. So, no, you cannot find all of them just by following the addresses. You have to connect the dots to find out who is who.
This is a good point and yeah very possible since we can use centralized exchanges as many as we can.
Because he knows that ninjastic archives as soon as he posts his application. But ninjastic bot does not show his Bitcoin address in the mentioned address tab when he edits the post later and his Bitcoin address.
I also noticed this few times, there was an account that I search on ninjastic.space, but I don't find any of his address even though the user has participated in few campaigns.
This situation getting worse if the campaign manager didn't quoted the accepted participants with the address, not show the full spreadsheet to the public or hide their address.