I have a lot of experience with affiliate marketing(as an affiliate), and I think you should strongly consider a CPA rather than CPS model. Very very few affili

I have a lot of experience with affiliate marketing(as an affiliate), and I think you should strongly consider a CPA rather than CPS model. Very very few affiliate programs, even ones with recurring monthly income pay their affiliates recurring payouts. Most pay a fixed one-time payment for acquiring the customer. For a site like yours, the industry standard would be paying about $2 for every free signup, or, alternatively paying $50-$100 per paid/free trial signup. The exact numbers will of course vary with your conversion rate and what's profitable for both you and the affiliate. That way, you don't get a recurring drain on your revenue, and affiliates see more money right away. Keep in mind that most affiliates market via paid search or contextual advertising, which means heavy initial cash outlays. As an affiliate, I want to see profit within a few days of running a campaign, and if I don't I drop promoting that offer.