+1. My pet hate at the moment is the RunKeeper app. Every morning I fire it up to start my exercise. The interface loads up, and the 'Start my Walk/Run' button pops up at the bottom of the screen. The button waits there for around one or two seconds, then slides up about a centimetre and another button saying 'Sign up for our Pro paid edition' appears in its place.
I swear the the delay between appearing and sliding up is always timed and changed each day to cunningly coincide with my finger tapping on the area where the 'start' button used to be so that I almost always tap the 'pay us $$$' button instead !!!
I wouldn't be surprised if it feels random because it is loaded after a network request with variable timing checks to see if you have the pro version or not.
I swear the the delay between appearing and sliding up is always timed and changed each day to cunningly coincide with my finger tapping on the area where the 'start' button used to be so that I almost always tap the 'pay us $$$' button instead !!!