Deals that are "Heating Up" are the ones well on their way to being Hot.
If you think a deal that's Heating Up is homepage worthy, then go
ahead and give it a plus. But if you don't think it's homepage
material, you can give it a thumbs down.
Use it to put an end to the cheaters, it is obvious if it is a crappy deal and has a high score, that something is wrong. So fix it..... and if it is a great deal do the same....fix it.