I can't point at data, but there's plenty of articles and reports, including this from the EFF: https://www.eff.org/deeplinks/2020/12/visa-and-mastercard-are-tr

I can't point at data, but there's plenty of articles and reports, including this from the EFF: https://www.eff.org/deeplinks/2020/12/visa-and-mastercard-are-trying-dictate-what-you-can-watch-pornhub https://www.eff.org/deeplinks/2020/12/visa-and-mastercard-ar...