Nice idea, sort of like the inverse of Product Hunt.

1) it seems aggressively walled off by login/singup, e.g. one must signup or login just to view the details of a problem.

2) there is a variation of this in the corporate world where “innovation” consultants try to pitch corporate clients on the idea of featuring business problems to a panel of startups. There are a few problems I’ve seen with this model but the most applicable is, people most passionate about a problem set aren’t always the decision makers to procure or fund the solution.

3) have you thought about how to make this a functioning market? It seems like you need to attract builder to work on these problems and subject matter experts to document the problems more deeply than the top level titles.