Support finally sent me am message. They sent me a html file that is invalid, and does not open. The file is supposed to show how I used more than 40 GB per proxy (110 of them) in 6 days....
Anyway, if you are planning on using GSA, these proxies are NOT for you. I spent $125 on 110 proxies that I got to use for 6 days before they shut them down for "overage".
The strange thing is, I have used them like this for the last few months. No one complained about bandwidth until now. I like how they waited for me to pay for another month before they used "overage" as an excuse to stop my service...