Verizon Admits that their Unlimited Data Plan is Limited to 5GB Per Month
tech.cybernetnews.com
tech.cybernetnews.com
But read between the lines: Carriers like Verizon still make their money in high-margin voice calls and text messaging fees. They would lose that revenue if you could use IM and Skype over their data network. Same for streaming video: Verizon really just doesn't want you using a competitor's IPTV product instead of their own.
They think they deserve a cut of the revenue for content sent over their network, even though all they're doing is giving you Internet access. This is what Net Neutrality is all about.
Anyone have the number for the FTC?
You could generate them dynamically.
Anyway, hosting companies like that massively oversell their capacity knowing that most people won't use it. If you actually tried to put up 30,000 (or, heck, even 300) active domains, the server would probably just die under the load.