I thought they tried that before
There was an interesting documentary where a local group tried to shut down a video shop in Utah for renting out smut. One of the key arguments in the trial was what is the "standard" for public decency and does the shop violate it.
So for the trial they got the payperview stats from cable and sat networks on porn in Utah. The lawyer team for the shop had no clue what the numbers will be until they came through. They showed the highest consumption of pornography in the USA and one of the highest rates in the world. If memory serves me right, it was something like an hour of paid porn per household per day on average. Utah has 700K households or thereabouts - that equates to about a quarter of a billion per year in revenues.