IIRC, most US broadband providers have published data caps (and had secret unpublished ones before the FCC’s transparency rules, the one bit of the earliest Net Neutrality regulation that wasn't struck down, forced them to be disclosed.)

Cox added 1TB caps in the Phoenix area in 2017. Only other competition is CenturyLink, which is DSL and in most places only provides 20-40 down/1 up. I think they're starting to up it to 60/80/100 down and up to 40 up in some places, though.

Cox Communications added a 1TB cap on all service tiers, including gigabit, four months ago here in Arizona.

It's $10 per 50 gb beyond that, or $50 for supposedly unlimited that I used to get in the base price.

Atlanta, GA. Comcast cable. I’m in the neighborhood for Google Fiber but I highly doubt they will finish the roll out. In the meantime, ATT has deployed lots of fiber in the area but they are slow to activate each street.