I am using a tooway broadband internet access (Ka-Sat Satellite).
As I have a Mac, I can't use tbbMeter and I recently found a new tool QuotaSatellite running on Mac (and Windows) to monitor my internet usage.
I found the tool well suited for my internet usage.
In the past, I get caught when my children and grand children were all sharing my internet access.
With QuotaSatellite, I see what is going on and I can warn everybody in time to not excess my quotas.
I hope this may be useful to some of you.