For what it's worth, every app on my phone is paid for (except the free ones) so I pay for everything I use.
I pay AT&T a $30 per month unlimited data fee and use very little each month. I recently got MyWi (no rock)(10 day trial) and tried it out for the first time, then bought the license.
As far as I am concerned, AT&T knows exactly how much data I use. If they have a problem with how much or how I use it, they will tell me and I will pay the tariff.
It is not stealing.
How did you get the 10-day trial of the No Rock version? I thought the 10 day trial only came with the Rock version??