[momokatte]

This sounds like a good theory. $10/hour is over 8x the cost of a c1.xlarge Windows on-demand instance.

c1.xlarge on US-East charts: linux - http://cloudexchange.org/charts/us-east-1.linux.c1.xlarge.ht... windows - http://cloudexchange.org/charts/us-east-1.windows.c1.xlarge....

Try offering $1.30 if you need linux or $0.55 if you need Windows.