I don't think this should go in Services, since it's not real a signature campaign, it's a competition. Maybe Games & Rounds?
It's a mix of both. This deal/comp seems like it could run into problems. I'd stick with other giveaways or just wait and use a conventional signature campaign to promote your site.
We will be releasing a full paid signature campaign within the next week. This is simply a competition. So only the top 10 posters would receive the 1% profit share.
Let me know if you need any help running it. Been thinking of offering my services to run a signature campaign. Sent you a message.