Most places that sell bandwidth by the GB/mo, that is also how they meter
it. Once you hit the limit, you site is automatically at that moment
replaced by a "Sorry, this site has used all it's bandwidth, check back next
month" page. Lot of good that does. These type of arrangements are dirt
cheap, long as you don't use much.
When you start paying for symmetric Gbps (note lower case b) that is when
you are more realistically paying for what you are using. And it ain't
$6/mo. It is thousands of dollars per month.
But I digress... what exactly does this have to do with classic computing?
Jay