Ok, here's some math-lite for those who are still thinking of selling their work for .20.
The guy who "trolled/advertised/spammed/posted" the original link stated that he has made around $75. He has 67 pictures in his gallery.
Now, most of us know that most photographers take multiple shots and pick the best one out of the bunch. So, if you wanted to make 67 great shots, you might have to take between 120 - 200 shots in order to get the *best* shots possible.
That's a lot of work for $75.
Now, we also don't know how long it took to make $75. It could have been one month or 3 months.
The other horrible thing about these cheapy sites, is that you're in competition with thousands of other photographs. So, in order to get your .20 the person downloading has to look through a thousand or so pictures to get to yours (unless you're on one of the front pages).
And chances are, if you are a hobby photographer or an art photographer, you won't want to take time out of what you enjoy doing in order to take pictures of keyboards, forks or businessmen shaking hands . . . etc.