@Yahoo is a good and reputed manager so I trust his judgement. We haven't worked together although I wish we do that someday. Cryptotalk isn't Yobit exchange, from my understanding they're just using yobit advertisment management service to promote their forum which happen to be through Bitcointalk forum. Just like any other projects out there using Google AdSense to promote their business that doesn't give the project same reputation as Google, vise versa. Bitcointalk has been a host to numerous scams through project ANN, signature ads etc that doesn't make Bitcointalk a scam platform.
Judge Cryptotalk as Cryptotalk, if Yahoo managing the campaign will reduce the rate at which spam posts are been paid for then, that's a positive news. Only wish he was given more privileges like been in charge of acceptance of members that would had been a more positive news.
Same thought dude, Its not yahoo's to be blame on. yahoo were caught on fire just by doing some manager's job (quality checker).
As you said yobit were just a mere payment method here and yobit is not the one who were promoted , Its just that spammers were too quick to find out they can spam a campaign like these.
or is it maybe the Cryptotalk plan to make them hyped up by making yobit as their campaign payment method
If it is their plan , Its starting to work