I’ve submitted a few corrections before. Garmin or Strava used it for mapping runs and I quite liked it because in my area their maps of trails were actually much more complete and up to date than Google maps. For example in one nature park the current trails were shown on osm but Google showed a completely different set. I later came across a really old and faded sign in the park that showed trails that lined up with what Google showed despite them not existing any more. The new trails WERE shown on a pdf the city provided on their website but I guess they must have never been submitted to Google or something. Fortunately there must have been some dedicated OSM users in my area who were inputting updates.