[quote=@LegendBegins]
Custom topics is something toyed around with a few years back. The main trouble you run into is standardizing custom tags such that the system knows one is equivalent to the other (e.g. urban fantasy, city fantasy).
[/quote]

I think the issue isn't so much about tagging, but rather that the forum's search feature is absolute garbage in many ways. It'll give you extremely dated results (like from years ago), if you search by specific category/section sometimes they don't show up, etc.

[url=https://www.roleplayerguild.com/roleplays]This link is probably the best solution to what they're asking for[/url], I believe. You can find it on the main page on the site; the "roleplay button" centered in the middle of the categories. Problem is that it only shows roleplay topics, so if you want to search for interest checks your only options are to search the interest check sections individually or use the search engine to no avail.