My new online marketplace business: any problems with (a) limiting how many sellers I accept into my platform and (b) the website not indicating which seller is selling which item?

I'm launching an online marketplace selling physical goods. I eventually want to scale larger, but for now I want to keep things manageable while I get my feet wet.A) Is there any problem (practical or otherwise)—beyond, of course, artificially limiting my supply—if I, say, invite 5 of my friends to sign up as sellers through my marketplace, but don't let new people join for a little while?B) Is there any problem (practical or otherwise) if listings on the site don't indicate who is selling what? So if Anne and Tim both list items, from a consumer-facing side, they just look like they're all from "My Company," but on the back end, consumers are either purchasing Anne's item or Tim's item, and Anne or Tim get paid accordingly after my company takes its cut.New to the goods sphere so I'm just wondering if there's something related here that I haven't thought of—again, besides the obvious "you're limiting your supply." see hubwealthy.com/wealthy