said by TKJunkMail :

While this doesn't get MediaDefender off the hook for the attack, it also removes Revision3 from the ranks of the pure and innocent. Their tracker was being used by pirates and they took a good long time doing anything about it.

Also, Revision3 also admits the DOS attack was triggered by their own actions and was an automatic response by MediaDefender servers and that it wasn't an intentional DOS attack.

said by knightmb :

I don't think they were pure and innocent either, but neither is anyone else that I know of. I see it more of a matter of principal; they found a problem and fixed it. It may have taken a while, but that doesn't excuse Media Defender from using the same exploit that the pirates were using.

If my local bank ATM had a bug in which I withdraw $20 and it gives me $500 instead at no charge to my account, it shouldn't mean that I should come by the ATM every day to take out my $500 until one day they fix the bug, so I ram my car into the ATM in anger.