I think the way you should do it as add services manually to your database and retrieve them because honestly, it's really not accurate at all. I tried OTC trading, crypto wallets, etc. I couldn't find a single exchange or wallet I've seen before.
As for the comments, people often don't like to bother and make an account unless there is something in it for them. I would suggest implementing Disqus so they can comment from their Social media accounts instead.
I like to second you. I checked crypto games and I am not aware of the games listed in site.
Games like EOSknight should ake up to the lidt.
For lending section, forum lending section can be included.