For people like myself who have all the Twitch drops this is really a bummer.
I'm kind of dissapointed and a little peeved that I won't be able to use the system to get anything. Well untill they actually put in exclusives, the one-time spool deal or something else.
I really hope this becomes something more than a Twitch items catch-up system as the idea is solid. As to how to expand the system, and what other items or things to offer, regular items should definitely not be available as they'll just become a means of farming spools. One thing that I do however think would be a great addition is a discount for the skins (or bundles of skins) you can buy in the store.
Nothing left to do now but wait and see how this turns out I guess.