In developing countries few have home internet, they have cheap mobi phones they can use at internet cafes.
Example Indonesia, the weekly wage is 10 to 12 USD a week
Yet you have lots of people using the net, via net cafes
So they get a cheap phone cable of wifi and they can twitter and FB and whatever
These are ideal countries for bitcoin, since most cannot enter the western banking system for legit CC's
So free bitcoin wallet, they go to local bitcoin seller and buy 1 or 2 bucks of btc in their currency, then they can use it to do inexpensive digital downloads and whatever
That is the highest growth future of all net companies, getting into the 85% of the world considered 'developing'.