I've seen some pretty ridiculous hits that payout like a penny for doing something that'll take at least half an hour! Gosh, those just really make me mad. I think that if people started to become a little more selective in their hits, the price per hit might increase!
Yeah. I have seen some requestors paying $.20 and asking to write comments of about 200-300 words. You just have to skip such hits and move on to better paying ones. I also work on low paying hits, but I check the time needed to complete the hit along with the corresponding returns before working on them.
It's cheap for people to pay so low to do so much. For those hits I know to just skip over them and find something else. But, there are always people that will do anything for a few pennies.