I'm trying to understand your business model, I really am, but for the life of me I can't figure out why I (as a developer/owner) would want to pay people to download my apps-- except for testing purposes, of course.
I think one of my underlying assumptions is that people are willing to pay to get out of the deluge of apps that are currently in the store. As an indie developer without a big company behind you its often very easy to get lost in everything. If the problem truly is that the app "got lost" then a service such as this could put it in the hands of people who will recommend it etc. That being said this is a fairly weak argument since an app that is good probably wouldn't have gotten lost in the first place.
Only time will tell I suppose