The number of PRs for Cosmic you shared is very misleading. The parent repo is full of submodules, so if you want to present the number of PRs to Cosmic as a whole, you need to count the PRs for each repo. For example, the software library app alone has more than double (3/182) the number you presented (6/90).
ok that makes more sense, was looking for their main/largest repo with the most stars, but yeah given it's made up of multiple sub modules its PRs are highly under represented.