Well there's certainly no shortage of them, and Oracle and Sybase have the same restriction. It's to keep open source bozos from slandering them, as you'd be apt to do if you ever got the chance I'm sure.
I know. I guess being unethical is okay if everybody's doing it.
It's to keep open source bozos from slandering them
These restrictions were meant for the other enterprise competition. Open source didn't even play in the enterprise DB market when these terms were put on EULAs.