I wonder how much text messaging costs in China, where $0.20 USD is a larger fraction of the average person's income. I suspect it's much cheaper, and yet the companies presumably aren't losing money on it.
Pulled from: http://www.marketoracle.co.uk/Article419.html
I thought this line was a bit staggering "...the average cost of a text message is $0.10. Last year, mobile telephone operators pulled in $50 billion in revenues just from text messaging."
$50 billion, that's a nice racket!