Can this be done renewal groups and subscriptions

I have read about renewal groups and subscriptions. But I'm confused, and don't know if I need to rethink how a subscription is offered.

For clarity, let's say I've got 1 product. I want this single product to be able to be purchased multiple times by a member. I read I can do this with renewal groups and a negative value in a field.

Is it possible to have these multiple purchases of a single item made renewable?

What I have is a page protected service, where a member purchases the ability to create say a webpage and then purchases the same product to create another webpage. The purchase of another of the same product is determined by a total signup count. That is to say the owner of the webpage is allowed say 500 subscribers, once this limit is reached, another purchase of the same product is required. I want the owner to be able to renew each subscriptions, so the owner's members can have ongoing access unless the owner fails to renew.


All Help Appreciated

thanks
F.James