Don't think it's the widgets. I've removed a lot, same result. I'm almost positive it's an app.
Is ad-free the same as the scripts that block ads? If the rom you're running has the script (and they do the same thing) you're much better off doing that... also, does it need SU every time it blocks or just when it starts up?
Check to see what's running in the background I suppose... or try uninstalling them one at a time hehehe
You have just been post-pwned.