No, likely in anticipation of the rules being changed back.

Better question for you. Why did ISPs attempt to fake support for repealing Net Neutrality [0][1], as well as spend money lobbying Congress? You'll note in that article that there were also fake comments in support of Net Neutrality, apparently mostly generated by one individual, but many, many fake comments against it from ISPs that even used real people's identities [2].

These aren't the actions a company takes if they don't have incentive.

[0] https://ag.ny.gov/press-release/2021/attorney-general-james-...

[1] https://www.pewresearch.org/internet/2017/11/29/public-comme...

[2] https://mashable.com/article/fake-net-neutrality-comment-fcc

No, because California and 12 other states, as well as quite a few local governments, passed their own net neutrality laws. The larger, national ISPs were pretty hamstrung: they couldn't really follow the NN laws in the places where they existed, but then impose non-neutral terms in the places where they didn't, without running into lots of trouble.

A federal rule is good, though, to harmonize things, even if the state/local laws were more or less already doing the job.