[seiferteric]

It's also telling that ISP's are fine with charging you per GB data you consume but apparently don't care about multi 10's GBS+ attacks that presumable consume tremendous amounts of bandwidth? I guess it says something about the true cost of data...

[greenreaper]

It is likely that they have plenty of spare outbound capacity, especially given how most home connections are asymmetric with respect to upstream.

As for their charging, that is called "value pricing" - what matters is the value to you, not the cost to them.