I am not a designer and I don't have gazillions of dollars to pay for a logo, but while I was researching about how to find a designer for a logo, I stumbled on this post:
http://startupbros.com/how-to-get-the-perfect-logo-designed/
I know of various critics about 99designs already, but this guy takes it to the next level. Ethics no more?
"and then messaging them to rub their ego and beg them to join your contest"
"I make it known that I like their past work and tell them they have been on my watch list (even if they haven’t)"