To be fair, OSM received a massive contribution when Pokemon Go players found out that OSM was being used for the game map and monster spawn types.
I myself started contributing to OSM because of Pokemon Go.
As long as they are making legitimate contributions, this is a good thing, but we definitely need to keep an eye out for users abusing the map.
We’ll have occasional spikes in activity that correspond to Pokemon Go updates, but once these users realize that Niantic only updates their maps every year or so, they start to lose interest. Consequently, any vandalism from those trying to game the system will also dwindle.