It's a pity DC didn't treat Moore a bit better. He's probably the best comic book writer of his generation and if they'd have kept him happy, they'd have made a lot more money and we'd have a lot more great comics. If DC had been nicer and Moore/Gibbons owned the rights to Watchmen, they'd have probably let DC publish it anyway.
Big corporations are naturally greedy. They want it all. Every damn bit of it. It doesn't matter that they would have more if they were a little less greedy.