Do any developers maintain statistics for their apps on jailbroken vs. non-jailbroken devices? Do any developers take jailbreaking into account when building their apps, or is it just an ignored segment?
It would be interesting to note trends in jailbreaking activity against iOS versions and any potential changes to functionality for App Store apps.
I work on social games for iOS, and it comes up in few places.
(1) Users ask "why am I getting this sandbox error message?" and we say "That happens sometimes on jailbroken phones. We can't fix it."
(2) We have to step up our game re: preventing cheaters, keeping in mind that jailbroken users can change their UDID, fake IAP transactions (but not the receipts!) and modify files on the device.
In a single-player game we wouldn't care about (2) so much, but in a multiplayer game we don't want them breaking someone else's game or polluting our statistics. I don't have numbers, sorry; we don't count the number of jailbreakers, just the number of cheaters.
It would be interesting to note trends in jailbreaking activity against iOS versions and any potential changes to functionality for App Store apps.