"Unfortunately, the use of Blizzard IP is prohibited without a license and you can’t use any Blizzard IP commercially."

I recommend to read through this topic:

http://us.battle.net/wow/en/forum/topic/2416115611

As one poster there says:

"Well, the sites you have listed actually don't charge for Blizzard IP. Wowhead offers custom graphics, removal of adds, custom avatars, but anything and everything related to WoW is accessible for free. Curse.com offers extra simultaneous downloads and a few other features for premium service. Again not Blizzard IP. Wowstead same thing, custom themes and added features but not Blizzard IP."

Don't get me wrong, I wouldn't want this to happen to MrRobot. I use their site and I love it. I think the app is a good way for them to get some money for the hard work they've put into. However, I am interested in this topic since I had few ideas to develop wow related apps, but the fact that I can't charge for them prevents me from starting coding (gotta eat sometime! :D). I also feel it would be unfair for other app developers who's apps have been pulled from the app store for similar reasons, to allow MrRobot charge for their app (unfortunately).

Unfortunately I don't think there has been any clear statement by Blizzard of what we can and cannot do. I mean, you could read through ToS/ToU/EULA, but who does that :D There's not even ToU for their website API... :/