Basing it on thumbnail clicks did NOT work at all and that's why it was changed. I often was conned into clicking on a DECEPTIVE thumbnail and then saw a pic that absolutely sucked or was mediocre, but the click had counted toward a hot20 status for the underserving pic - and there was NO way to take it back, however much you might want to. Back then, it was a "top 20 THUMBNAILS" score and nothing more. In fact, I got so incredibly burned out on deceptive thumbnails that now if I see ANY thumbnail that looks like it's just a tiny portion of a larger pic, I will NOT click on it, PERIOD. I also will not EVER click on any item without a thumbnail at all. Personally, I think thumbnails should be required for all gallery entries, and they should be required to be mini's of the FULL pic. Anything else leads to deception and fraud, not always, but far too frequently.