Well, I guess my 500 subscribers from one book does kinda pale in comparison to the 14,000 (!!!) your main comic has, but I don't feel particularly "buried" by the big creators just yet. Tapas certainly is no Wattpad where story discovery is literally impossible for anyone not already popular, and that's a very good thing. I've found quite a lot of under-the-radar stories just browsing the site, and even the recommendation sections have helped me find some nice stuff from time to time.
I guess there's a chance that free/user uploaded stories will become a lot less of a priority for Tapas if its Studio Tapas work, but I do think those stories will remain a backbone to keep the company's library strong. After all, they are debuting just 30 Tapas Originals next year according to the press release--that's not nearly enough to compete with other web comic and web fiction services by itself. They'll be very wise to continue promoting non-originals stories whenever they can.