Not sure if the decision was made due to iOS7, but mine (Paid version) doesn't run on iOS7.
IMHO, this is needed even more in iOS7. Some of the UI design choices on iOS7 are terrible like the removal of button backgrounds/borders. I upgraded an iOS6 app to iOS7 and gave it to a friend and he just stared at it because he didn't realize that there were buttons on the screen for him to click on.