On the Matter of Slashdot Story Selection
These people aren't submitting stories because they're good people, they're aiming for profit.
Slashdot has a very high pagerank on google. Google highly values outbound links from a good site. So, if you want to get your site raised in the google rankings, simply get slashdot to link to your site. These submit-whores don't care about slashdot, they don't care about quality stories, they just want that link.
A true slashdot supporter will submit stories regardless of personal profit.