I am no AI fan, but I do not see this going away. I think if you can get enough people addicted, they will pay costs if the costs seem nominal at first.
If someone can’t write well and has an upcoming deadline for an essay or needs to write an important document, they might use a one-time fee. If someone uses it for day-to-day decision making, they will certainly do a subscription if it seems cheap at first. And once you have those people expecting to pay, the price keeps increasing every couple of years.
Example a - Facebook. Rolled out as an entirely free service and enrolled billions of members. Now enough people pay for extras in things as stupid as Candy Crush that they can tack millions onto their revenue for nearly no benefit provider. If enough people pay $1 for something stupid, it pays off
Example b - Prime streaming services. It was a free tack-on to people with Prime memberships. So people bought Fire sticks and use it as a home base. And now they are so cemented into the system and don’t know how to use an alternative so they will pay for 1) extra apps that will show the program they want, which will pay Amazon a fee and 2) pay extra for no ads now that they are addicted
I also have no doubt that advertising can be baked into AI. Just wait until it writes a pathology report and recommends a certain brand name medication, or gives someone a to-do list for hosting a Christmas party with specific brands and desired trends listed.
As for video generation, I think you have a small enough pool that does this anyway, and this will increasingly be consolidated by price towards a handful of powerful individuals who want to sway public influence.
You and I may not pay for it, but have no doubt you can get similar adoption to streaming services and you can get people to pay for anything if it feels cheap enough to be nothing money. I’ve become a cynical old fart and I’ve watched this song and dance too many times.