To create a fully functioning system, I need something like this combination:
1. Sales Page - OP2.0 Optimizepress
2. Membership Plugin/Content Protection - DAP Digital Access Pass
3. Shopping Cart - 3dcart, Shopify or 1Shoppingcart (affiliate feature a priority)
4. Payment gateway - PayPal Paymates Pro, eWay, Authorise.net etc
Are there any solutions out there to combine these options to keep my costs down?