Crash Time 2 Steam Key Giveaway

From the rules

Not allowed:
Third party giveaways that require or reward users for performing profitable actions. For example, linking to a giveaway on another service that requires or incentivizes users to click a referral link, like a Facebook page, follow a Twitter account, join a Steam group, complete a survey, sign-up for a newsletter, or make a donation.

I think this might fall under that.