I really think they make it up.
I have access to 150GB of allowance.
Last night I had used 132GB. This morning I turned on my puter, but have been so busy I have not really used it.
Now I get two email in one day......warning me of my usage.
How can I jump from 132 to 160 in less than 12 hours. This totally beats me.
Anyone else had this issue.