I for one never heard of it and am planning on trying it out.

I can guarantee that all of those people at some point in their lives hadn't heard of it. People have to learn about it somewhere, why not here?

I found it on my own, but I had to do a bit of digging.. I wanted a way to capture my screen and didn't want to run any non-FOSS software if I could avoid it

As of a few years ago, anyway, there were a LOT of half-assed apps out there to do a bad job of the same thing, and they were dominating the search results