I try to help OSM by sending gps-tracks of my mountain-bike-tours. The benefit seems to be clear to me, because of using pathes and ways and streets.
Would my gps-tracks made during ski-tours also help? They are lines in free areas.

When you’re descending between trees through the forest then the ski-tracks would be useless. But if your ski-routes follow roads through the forest/area then these are useful.

Maybe some hints and examples are at