It's definitely a saturated market this whole ESL site thing and most people are in it for the cash. There is a big big market here in the EFL industry and plenty of people want a piece. However, I agree with openmind that there is more to it than just the change on the side of the curb. Most web sites are looking for the quick dime and for teachers to fork that over, but it
me off.
Now, don't get me wrong, these web sites cost real money to run (not to mention time.) There are server fees, programs that need to be bought, licenses that need to maintained... But, what some people charge for and what others actually pay for makes me laugh.