In version 4.x I can't seem to find an option to assign a certain payment system (plugin) to a certain product. I thought I had done it in version 3 at one point many years ago, but darn if I can't recall how. Any thoughts?
just what i thought last night mate as on stripe i pay x % and when i heard that if someone sends you a voucher for moneybookers its double the % i wanted to add that ONLY to year subs.
I created product categories to use for different payment methods. I assigned products to the appropriate category. I created custom signup forms (http://www.amember.com/docs/Custom_Signup_Forms) for each category. In Forms editor, using the Product brick, I configured the products for that form to display only those products in the appropriate category. I edited the custom signup form to only allow the appropriate payment method to be selected. I am still testing, but it looks like it will work.
The site is not live yet - I still have an open ticket for help with the captcha on one of the sign up pages to get it working properly. I can post a link privately if you would like to take a look...