Re: How many spied on?
Well, I guess the answer is variable as the population fluctuates daily due to birth, death, and immigration.
The real trick is they can suck up and store all they want, it's the analysis that has to be a problem. How the hell do you analyze all the internet useage of around 300 million people? Yeah.. some are too young or too old to play on the Internet, but still.... I suspect that a lot of this is "CYA" so they can say "we knew about them".
Personally, I believe a more targeted approach than a mass sweep that never gets looked at. There's too many abuses that can be done with the mass approach.