As someone mentioned in another thread you would need to invest in a server thus actually increasing the overall capacity, rather than artificially increasing it or decreasing it.

I do not know much about servers, but as I understand it Google runs a server and they doing so I do not think affects the traffic of my website. If however Google running a server would mean that my website would run more slowly, except for perhaps the distinction that it adds real capacity, I do not see how that is more different than paying the ISP to prioritize your traffic. Though I might need some enlightening.