Seems like a bit of a grey area. If I understand it right they are rewarding them on their platform, using the usernames from their site (not the forums) I'm guessing it tracks the 30 ads there. This would be the part that may be considered against the rules.
As for the second part it is a giveaway of sorts, not everyone receives a reward. This is also done off-site, but requires the entry here.
My guess would be that if it's permitted it has something to do with it being in games and rounds as opposed to say Altcoin announcements or say a service announcement.
Dug a few posts in and I see this:
*snip*
You have to move the following, to your website instead (perhaps a special section for it):
- - Surf At least 30 Ads everyday and post your username here, We will give 100 Satoshi Bonus in your balance
- - Post about your daily earnings here, 1 user will randomly get 1000 Satoshi In their balance
Their response was this:
Hey SFR10,
*snip*
Specifically, you are not allowed to give people any incentive to post insubstantial posts in your threads. You can't offer to pay people who post their addresses, usernames, etc. You can do giveaways off-site and link to the giveaway page in a thread, but you can't give people any bonus for replying to your thread.
The incentive is not given for posting anything.
Incentive is given for participating in site and confirming it here. We are just promoting our site activities, not bitcointalk activities. I hope it clears.
Best regards.