I only know about Cryptotalk. It's a campaign that was run by Yobit before.
This part of your answer is irrelevant too.
Cryptotalk runs its signature campaign in Bitcointalk through Yobit team, it is correct but, a big but, it was hosted in a last bear market, in 2019. I am sure you are here long enough to know Bitcointalk had signature campaigns years before 2019.
CryptoTalk.Org Signature Campaign [Yobit Panel].