I’m planning to release a 99¢ ad free version of I Can Has Cheezburger as well as the free ad supported version. I’m debating whether it should also have any pro features not in the free version.
In particular, I’m adding support for the Cheezburger Authentication API, which would allow LOLs submitted by registered users of ICanHasCheezburger.com to be attributed to them rather than being attributed to “dunno source”.
I suspect the ad-supported version will most likely be more profitable than the 99¢ version thanks to the amount of time people spend in the application, so I’m not really too anxious to encourage people to upgrade, but I’m providing that option for people who’d rather not have the ads.