A psychology experiment at uni... I got paid £10 for sitting inches away from a flashing screen for 30 minutes. Was not worth it AT ALL. I actually enjoy tasking apps for the most part even if they're poorly paid.
I think that some of the work I do isn't highly paid, surveys for example, but I enjoy them because I do them while watching TV or listening to an audiobook etc - so not as boring as just staring at the screen.