How about a twist on the original idea: Reviewers submit a short review with the basic findings and points of improvement, and hint at a more in-depth review.

How about a twist on the original idea: Reviewers submit a short review with the basic findings and points of improvement, and hint at a more in-depth review. For a nominal fee, you could access a more in-depth review and consulting (maybe with coding help, etc..). The site could be a nexus between people needing reviewing help, and consultants, for a small fee. Top reviewers could make a living out of this, other people can submit good reviews in the hope of being picked for consulting work. Just my 2 cents of brainstorming (probably millions of buts to this one).