I\'m trying to research how to add a subscription based pay model on an existing site of mine, but am running into a lot of conflicting information and caused me to be a bit los
If you're using Paypal subscriptions then you will probably need a Paypal business account. Nothing scary it's just a case of supplying a business name to paypal and requesting your existing account to be converted over.
I also looked through a few Paypal subscrition solutions for rails and eventually just created my own.
I've written it up here Adding PayPal subscriptions to your Rails App with 1 Controller.