PayGear vs Click2Sell vs JVZoo

Hey mates,

I'm looking for a ClickBank alternative for my product (Automated link-building software, subscription based),
because ClickBank do not approve such products.

I've tried JVZoo, but had some problems while testing their IPN, and could not get good support.
I'm now looking into Click2Sell and PayGear.

Any input on these 2 will be appreciated, but mainly would like info on:
1. Support on integrating subscription based products (with IPN - instant payment notifications)
2. Ease of integration
3. Number of affiliates

Cheers!

how is jvzoo with affiliates? is there a decent amount of people who will make sales on there?