[seadan83]

I think the arrow of causality is perhaps the other way. Recall the "moral majority", Jerry Fallwell, etc. It was a big right-leaning effort to ban porn starting in perhaps the 70s. Probably earlier. The republican party used to have religion as the main ideological component, and immoral porn was a plank in that platform - the party of "family values."

That campaign to ban porn never really ended AFAIK, but my impression is the priorities of the party really shifted about 10 years ago to the point it's no longer an open policy (the word pornography no longer appears anywhere in the Republican party platform [1])

Remnants of the anti-porn part of the party can certainlystill be seen in the republican party, eg: Mike Johnson extolling his use of "covenant eyes"

Thus the arrow is flipped. The anti-porn cause was very active against printed pornograpghy and continued into the internet age. A right-wing/conservative movement and efforts both predating the internet.

[1] https://prod-static.gop.com/media/Resolution_Platform.pdf