I was looking at the EC2 dedicated hosting because of their dynamic load balancing and resource distribution. One of the big problems that the pools have is dealing with DDos attacks. The way I see it if a person could mitigate attacks (and the downtime that comes with it) the word would spread quickly and could make you a big player quickly
You can mitigate resource abuse in other ways, such as a round robin NS, with a pool of DNS servers, a pool of proxy frontends, smart firewalls that limit packet speeds and packet count for specific types of packets, bandwidth limitations, requests limitations, extra coding in the websites to detect abuse and dispatch abuse transparently (such as pretending to send data for a connection and dropping it without a WAIT state) and so on. Throwing more hardware is a bad arms-race, you throw in 1000$ a month, the attackers throw in 1000$ a month, you throw more, they throw more, you waste your profits, they spend less on you than the benefits they (presumably) get...