This is not yobit's fault, it's clearly OP's fault since he join the campaign even without a formal announcement.
Obliged or not, if you treat your own "freelancers", (because that's what promoting a site is, more or less), like that, like literal dog shit, by first claiming that you resume the campaign, and then suddenly introduce a radio silence and stop communicating altogether while people are still promoting your business thinking you operate in good faith, well, you definitely deserve to get called out for that.
Although, looking at Yobit's other malpractices, this is probably likely just another day at the office for them, and nothing compared to the other stuff they already pulled, so no big surprises here that things went down like they did.
I guess you are somehow right because they only made an announcement about the yobit campaign but eventually they got punished with 60 day signature ban, and after the ban was over, some were thinking they can now continue to promote and get paid but no payment at all.
yobit has no made any announcement after the ban and it seems like they don't really care about the forum since their campaign was juts announce through twitter.