>>Even at $2.20 US, a few gallons would be worth scooping up for the average person there, from what I hear.
That's right. Think about the fact that people like those in the picture may have a monthly income of 300-500 RMB (40-60 USD).
FIve gallons (20 liters or so) would be about a week's pay. Wow, (and people carp here).