In the Bay Area Comcast offered (2017-2023 at least) internet with a default 1-1.2TiB/mo data cap that you can lift for the month for an extra 10-20usd (I don't recall, my roommate who played CoD was the one paying for this by himself on every month with huge updates).
There's barely any competition here. You can pretty much chose from Comcast Business or XFinity, which both are just Comcast because of a free market with free as in not in jail.
Really 10-20 more? When I asked, and I'm in the Bay Area, the unlimited plan was $5 a month more than it would cost if I leased their modem.
How much more was it than if you weren't leasing their modem?
It used to be 30/month for me. I was not renting their modem and got charged more for it.
If starlink ever gets more capacity, I'll probably switch. Right now I think the only way to get gigabit down on starlink is with four or five accounts and manually bonding the dishes together. As soon as that obstacle goes away, Comcast will have competition in my area and I intend take advantage of that.