except google. They copied OSM data in the past, and used in their proprietary offering that includes reselling the data. A blatant offense of the OSM license.
They were caught red handed in 2018 i think, and blamed on some contractors. But most interesting, despite this being a widely know fact for the mapping community, i can't find any mention of it anywhere today.
There are suspicions, but no hard proof has ever been found about this.
However, there is a well-known (and non-problematic) case where OSM-data is used in GMaps. Some polish bus agency used OSM to create their GTFS-feeds, which were ingested into GMaps. Selecting the bus line will thus show an OSM-based line layer; but as that line layer is clearly attributed with OpenStreetMap, that is totally fine; both legal and ethical. See https://twitter.com/MapAmorePH/status/1453863816110952450?t=...
