The good thing is people that go to that site arerealizing they need to have their work mastered. Given the number of artists that call mixing mastering or have never heard of mastering, this is a positive step. I'm actually being serious.
Second, I guess that many of the clients they get don't ever record anything ever again anyway. They just want a nice CD to sell out of the trunk of their car.
Third, you don't get what you don't pay for. (The wording is intentional as I don't believe you get what you pay for is 100% true).
GH