How does this compare with elusivestars.com? They're trying to do a similar thing, allowing developers to upload Android apps and pay reviewers to provide feedback. The goal is also to provide better reviews than the Android Market.

Personally, I'd be more interested in paying a small amount (say $10 per review) to a number of people and getting feedback from a few different perspectives, rather than putting all my eggs in one basket. $100 per review would only be worth it if the review would be published in a prominent place where it could provide some publicity for my app as well.