Yahoo will only accept the position if the devs and staffs will send an amount inside 1month or 2 weeks payment bu it will depend. I have also checked icoforums, with the activity bounty most paid are those who post 100+, and some aren't considered as good posters so in other words they are picky, and i really bet that the admin of that forum has a huge amount of eth.
The owner of the forum already proved that he owns the wallet that have a 1000 eth in it a week ago. He already have paid a lot of spammers in his forum.
Question now is why is he spending that much in a forum? And how come he have all the money in the first place, yet he didn't hired a responsible bounty manager to handle his campaigns and manage his forum in the beginning?
People need to be careful with their accounts in there. I've seen people who uses the same username registered here and then in icoforums. If the forum turns out to be a scam, I'm sure the people behind it can take advatage of users data and may even try to hack their account in bitcointalk.
