About evaluation - you are right, they don’t say they are contributors in their comments explicitly (which they probably should do), but it was quite telling in one case, when a person trash-talked about OM clearly without proof, but then if you go to its profile and visit a personal website from there - turns out that they are a contributor.

I totally expect that’s is also the case with other commenters, but it’s fair to say it’s mostly a guess on my side as for most people you can’t say for sure as they don’t have GitHubs linked to the profile. But I’m 100% sure there are several contributors commenting there, especially taking into account how many CoMaps comments and mentions are there and overall popularity of this app, which is not very big.