No, there is only one .com Registry: Verisign. There's multiple Registrars (the companies you as an individual typically buy your domains at) for .org just as there are for .com
As far as I know, you can't "pay off" a domain. And most of us are at some usually negligible risk of losing a domain by mistake or because someone bigger wanted it.
Rent.
As far as I know, you can't "pay off" a domain. And most of us are at some usually negligible risk of losing a domain by mistake or because someone bigger wanted it.