A PIMP is a man who controls a womans mind. She in turn will bring him everything and anything he needs, until she is no longer of any use. A real pimp has lots of women like this.
http://www.PimpDred.com is a real pimp. Not a fake like all the rest of the pimp sites out there. He has about 15 hos that work for him day and night, brings him ALL their money and caters to his every need. That is a PIMP.
Why webmasters call themselves a pimp... I have no idea. I think white men started using that term to mean he is in control of something, or at least wants to portray that he is. But I will tell you this, whatever they are doing... is not real pimpin' and has nothing to do with The Game.