The largest US ISP does. I had to email Comcast's CEO last year after weeks went by stuck with 3 motorola/arris modems receiving a broken provisioning file. I C

The largest US ISP does. I had to email Comcast's CEO last year after weeks went by stuck with 3 motorola/arris modems receiving a broken provisioning file. I CC'd every other employee I had spoken with. Prior to this support couldn't escalate, reddit was worthless, and dslreports only further confirmed my issue. Within 12 hours of emailing him this I was on the phone with an engineer that resolved the issue. EDIT: T-Mobile's CTO Neville once dispatched a cell on light truck to my town after I asked him on Twitter. We had a large annual weekend event anticipating >50k attendance and it usually cratered the network locally. Finally with the truck things were mostly usable.