Not the first, but also probably not the last. This one bills itself as ‘Enable WebGL’ on the ModMyI Cydia repository, and whilst indeed it does use some WebGL, fundamentally it is an off-screen frame that simply reloads every time you change screen on your iPhone and earns the author ad revenue each time it does so. Not too malicious then, but it still steals processor cycles and therefore battery usage and therefore your electricity bill and therefore your money :-P

Full writeup here.