Well, now porn biz Naughty America wants to sell this sort of caper to horny netizens.
They're packaging the wrong poduct.
If the first adopters wanted fake celeb sex vids, that's what the rest will want. If there was a market for 'paste your own cum-face' - that's be the first thing it was abused for.
When pornography photography was invented, the first [ab]use of it was selling piccies other people doing it, not setting up photo salons so you could have piccies of yourself 'doing it'.
Before photographs, 'illicit' illustrations features the countries lords, ladies and leaders 'doing it'.
A better seller may well be paying celebs for their footage and offering to sell 'you face 'dubbed' onto partner of 'celeb of your choice'. Not that many celebs would go for it. But theirs always look-a-likes.
I'm not saying some won't jump for the current offer, but I don't think it's a big seller.