I know this is extreme newbie question even though I'm not all that new to SEO or proxies, but why are there "hundreds of thousands" of free proxies out there? What is the benefit to the host? Or are these all/mostly installed by viruses and the owner is unaware? I've looked for the answer to this but never can find one -- everything about proxies is how to find them or how to configure them.... but no one explains why they are hosted. Thanks!