1) You need a 3rd button for each submission that says "Already Solved". People can post links to SaaS products that already solve the exact problem the users are posting...

Example: Following 2 Submission have several products that solve the exact same problem.

- Gamify budgeting so I save more money => https://www.demandrush.com/problems/gamified-savings-app

- Community chat on my website => https://www.demandrush.com/problems/onsite-community-chat

2) You also should introduce some sort of flagging or curation, because quite a few "Problems" read like 1 off specific requests, and some descriptions are also really vague and too broad

3) Might also wanna provide Upvote (only, and no downvote, like ProductHunt and Facebook "Likes" :) button to assess popularity, because not everyone might be mentally willing to commit to monthly payments, but might really "like" the idea and think it deserves to be solved.