I agree - there's always a danger with companies that try and have a lot of their product as OS that someone will come along with an OS product that plugs the gap in the only place they're trying to make a profit!
I think because in this case they enforce that by hosting the control plane themselves, it doesn't really matter. I wouldn't use something I can't self-host anyway, not something as security-sensitive as a VPN.
So many users will not have even considered the paid version anyway, and their participation will give tailscale a higher marketshare and thus more viability.
