I'm not fond of keeping spins around when we're focusing on products.
That gives the message that they are second-class citizens in Fedora.
I'd rather define a process that allows current spins to become either
sub-products or full-featured products
when they meet a set of requirements (that is to be defined yet).
In a contributor-driven community, it shouldn't be a problem to accept new
products if it is backed appropriately.