Social games are a prime example illustrating the parent's point that true micropayments (as in, lots of very small payments) don't work - they all have found that the payment models that actually bring in revenue are "micropayments" only in name, they're exactly as it was said, either "a monthly bill for all you can eat" ... or "discrete payments of $1-$2-$10", or even very high price packages targeted to a few "whales" that still bring in a substantial portion of total revenue.

Charging $10 is accepted by the paying consumers, being nickel-and-dimed isn't. Even in the "micropayment" games.