Yes, it's worked pretty well for eg fusion festival (well, they don't really enforce the I'd thing, but apart from that..): https://www.fusion-festival.de/en/x/

Yes, it's worked pretty well for eg fusion festival (well, they don't really enforce the I'd thing, but apart from that..): https://www.fusion-festival.de/en/x/start https://www.fusion-festival.de/en/x/start (ticket raffle not up yet for 2020, though)