They'll vary wildly, as much as they think they can get away with, in the hopes that you will never use the service and pay them as much as possible for it, and they'll bury your mailbox with crap to try to wear you down into coming back.
They will happily let you pay for years, for services that no longer exist, no longer connected to any of their networks. They'll take you to court rather than pay anything back; they know they are receiving extra money, and there's a significant amount that comes in, but "oh, it's so confusing, and there are so many legacy systems, we can't possibly catch every mistake."
The money they shuffle back and forth between each other, daily, reeks of book cooking - you might have a stretch of 20 miles of trunk in which there are 20 separate owners - not concurrent riding separate fiber lines, but in sequence, each paying rent to or getting rent paid by the adjacent rider, even though only a single company actually services the entire span.
It's funny how construction companies and ISPs get these rackets going, and then when people come along like these PrimeOne guys and offer a reasonable rate on a decent product, it's somehow vastly disruptive and threatening.
They'll expand, and be encouraged and allowed to expand, and after 5 or 6 years, the big ISPs will start circling, and eventually buy them out, and they'll retire happy. AT&T or Lumen will own their network inside of 10 years, and they'll claim it's modernized and upgraded infrastructure. People with shitty oversold undermaintained cable internet will be left alone until the money stops.
Starlink to phones is great, if it only didn't make ISPs so much money handling the base stations on the ground.
There's fiber all over the US just hanging there, unused, unmaintained, because merger after merger after merger left giant piles of assets under the ownership of companies like comcast and centurylink and at&t, who left infrastructure to rot, often built with public funding, and maintained their local monopolies and shitty service.
Whatever it is we're doing to regulate the industry at a federal level isn't working, but I imagine that's where a lot of the money goes.