If you build it, they won't necessarily come. Marketplaces provide a channel for discovery.
Plus: since i've the honor to talk to you...i was thinking about joining wrapbootstrap...but you have ACE Admin (and others) which, for people that just upload their first template, are "way too much on top".
That really didn't help me (and really doesn't help new comers)...it's what i actually believ being a big problem of wrapbootstrap.
Do you see that as well?
Now we just need lower fees to make developers happier...or a service that can match the high fees (eg. possibility of create and manage affiliates, more payment methods, discounts, etc.)