How do services check projects for commerce?

Question

OpenStreetMap

If Yandex is clear (the robot enters the site and checks access), then OSM is not so clear. Maybe by load?

Answer 1

Yes. for example, the http referer field from the tile request is monitored.
in Yandex probably similarly.
the robot is redundant, searching for requests for Yandex in script footcloths is long and dreary - the browser will automatically enter a referer with the url of the original site for each request for a map tile.