@owiecc@en.osm.town I assume by "sustainable" you don't mean environmental sustainability, but financial stability & viability. I have seen that model tried at least 100 times since 1993, and it never created long-term revenue streams in any of the cases I noticed. IMO these usually fail b/c users are too confused to bother. It wouldn't be a #copyleft license regardless because a key tenant of copyleft is absolute equal rights for all (including commercial actors) under the license. Cc: @trashheap@tech.lgbt @jlou@mastodon.social