If the Microsoft was liquidating bit coin the way planetjones describes, it was probably too inconvenient since the exchange rate (Bitcoin to $) would fluctuate so unpredictably and wildy (at times) there was no way to reliably exchange bitcoins for the exact amount customers were charged.

If the exchange rate was too low, MSFT would lose money. If it was too high, they'd be breaking a number of very basic but important laws that are designed to protect consumers.