How did Apple "fuck them"? f.lux depends on APIs that are not public, and probably never will be. There is no legal way for f.lux to operate on iOS short of being distributed as open source and compiled by every customer (the same mechanism they tried to abuse a few months ago to distribute a precompiled binary). Since f.lux cannot be distributed for iOS to begin with, Apple's not doing anything wrong by building the feature into the OS.
Am I wrong? I don't think I am. If I were a f.lux developer, given the reality that f.lux will almost certainly never be allowed to distribute on the iOS App Store, I'd be happy that Apple decided the functionality was useful enough to put into the OS. It's not like they're charging money for f.lux anyway, so there's no lost revenue here.
It's completely legal to operate on iOS, it's just against the App Store rules. They made it available to jailbroken users starting with the 3G iPhone and have a pretty strong following.
