The problem with this implementation I feel is that I'm 100% willing to spend hours scrolling through logos for something that would be the face of a project, so the top pick, or even the top 100 picks are not really meaningful to me. The part where this kind of service could be useful is that its faster to scroll through options than to fiddle with logos in photoshop to create options. In that vein I'd include a feedback loop where you can explore things that are adjacent to something you like. In my case I'd say "This icon is a slam dunk, lock it in and let's explore other elements."