Why would the provider want to do anything? They suuport (make money from) their cudtomers. And the more traffic the send/receive, the more money the providers make.
Wouldn't surprise me if the providers were selling access to their customers networks to the botherders so they could make money from both ends.
A support call to an end-user serving ISP takes how long to ROI? That wouldn't make sense.
I've heard this crap for 20+ years now. "attack traffic" is unplanned
traffic. Build networks to support "random" bursts of garbage is much more
expensive then you will ever get to bill for. You clearly have no
understanding of the economics of networks.