Yepp, Hanlon’s razor: they are mostly just lazy and maybe incompetent, not necessarily evil, that’s just a side effect. E.g. in my country if you call them that you want to get out of CGNAT they’ll just do that for you. My IP haven’t changed in years, but I don’t pay for fix IP. But it may be different in each country, I have mostly good experiences with local ISPs here.

1 up-down cycle doesn’t wear the battery, negligible. It would only count if you would do this every day. It’s recommended to calibrate a new battery