There exists a message board called "Credit Cards and Consumer Debt" within the Motley Fool. I commented there for a few years on a variety of subjects, under a pseudonym (which is laughably transparent to anyone who knows me but please don't take that as a challenge, HN).

I was originally there because my credit report suddenly got $100k+ of debt added to it due to a series of errors. I researched the CRA and FDCPA and, in the process of doing so, found that forum. Many folks with different fact patterns needed relatively similar resolutions to mine or ones which were predictable based on information I had access to, so I started writing replies like "Yeah just write your bank and tell them $FOO." It turns out that the types of folks who end up deep in credit card debt often have some difficulty in banging out a quick professional letter. I didn't, and I had a lot of free time on my hands, so I drafted perhaps a few hundred letters.

This is one of my more esoteric hobbies, but it has been occasionally useful over the years.