Did you review places via Google Maps in the past? @mangroveReviews@mas.to now offers a way to import your past reviews, which means they will also appear in CoMaps in future maps!
I was thinking about this video, however they did not cover that topic. Perhaps it was a map related video not from MapMen? Or searching videos for anything other than their title is impossible? Anyway, I found a good video that explains it, take a look here.