Blizzard should mind their own damn business. Yes I could see how someone could construe this as a conflict of interest(making money off of WoW) but if they are going to allow addons in the first place (which started with Diablo; no other big MMOs allowed addons) why the sudden rules when everything's been running fine for all these years? If Carbonite charges people who are already paying Blizzard customers, I don't get why Blizz cares.