I mean, you could probably use them that way, but there's no indication that they were planning on doing that. One of those devices is only ~$3000, so if you want to spam all of New York and the upside is a bunch of people sending you their life savings it's not exactly an investment that's out of reach for your average crime syndicate.
State actors would probably hack into the Telco systems themselves instead, which you can do without needing to be on the ground. Or they'd keep their DDoS device in their embassy and do it from there.
Yeah, MAGA is just an expression of the things set in motion by the Powell Memo (in some ways Trump hijacked that infrastructure for his own profit instead of sharing amongst the other sponsors of that plot). All those conservatives in the courts and in safe red districts will just stay where they are and spin up some new 'movement' like the Tea Party before it.
Conservatives can easily be convinced to believe the opposite of what they believed just a few years ago, look at how they turned in George W Bush basically effortlessly.