Why does just about everyone that has even one single paysite feel the need to have and affiliate program website as well? I see so many sites like genericpornsite.com and you click their 'webmasters' link and you go to genericpornsitecash.com or something like that.

Is that really necessary? If so, why? I can see the need for an affiliate program site if you have multiple paysites in your portfolio that use the same login information. But other than that scenario, it just seems kinda like an ego-stroking exercise. "Me? Oh I'm the owner of genericpornsiteCASH.com."