Imho, need to stop being open sourced ^^
It is still open source. Nothing prevents you from buying something that is open source either. Also, we can't just change lisence because everyone who have ever made a commit into TFS need to agree on it. And even then we'll need to remake all the otserv parts in it (unless all the otserv devs agree to).
Would you like to work for free? + people take your work, put in their server, and get donations for free (?)
I already do.
Yes, but OT would never been so big if we'd just sold our code. I'd bet on maybe 2-3k players in total.