Can Plimus handle this? Lets say I have a 2 tier subscription model. End user can sign up for $xx/month for basic service. If they want all the fancy back end features, they need the premium subscription. When they upgrade from Tier 1 to Tier 2, will the affiliate get credited their commission if its still within the cookie time? Can I choose the cookie time (say 1 year)? Can Plimus even handle this upgrade model? Or am I better off making 3 subscriptions, the basic, the premium, and the premium upgrade as their own individual "items" so someone who is on basic just subscribes to the upgrade, affiliate gets commission on that additional sale? What about handling refunds/chargebacks. e.g. someone subscribes, affiliate gets paid, 30 days later they refund, can Plimus then debit it from the affiliate? Actually, do you have to have a refund period like with Clickbank? I'm leery of using Clickbank with a 60 day refund period on a subscription based service. The user shouldn't get a refund, maybe a pro-rated refund depending on how far they are through the service period. Does anyone know of an easy way to handle all of this? Do I need to buy a script and handle it in house? Or will a service like Plimus do it? I was originally thinking Clickbank because to me that == easy, but I don't think it will do what I need.