I'm sure they wouldn't.
My assumption, which could be wrong, is that many adults want to access porn websites, but don't want their kids to. For them, requiring a password to visit any .xxx site would be very user friendly.
So whether the porn industry wanted it, if the market wanted it, it would happen.
What do you mean by "if the market wanted it"? Unless people actually stopped paying for porn on non-.xxx domains, or they payed more for porn on .xxx domains, then there is no market force encouraging porn companies to change what they're already doing.
(Rant: The personification of "the market" to the point where it is capable of "wanting" things on its own initiative is a pet peeve of mine. It's not a person. It doesn't have desires. Market economics is a descriptive theory, not a theological statement.)
Exactly. If .xxx became the de facto "porn tld", to the point that porn buyers look for .xxx sites first, then yes - the porn operators would move to .xxx.
Not saying its likely, going to happen, any of that. Just responding to your point that .xxx wouldn't work because porn companies don't want it.
Re: your rant - was this necessary? Obviously you knew what I meant.