[DuncanWaring]

Prostitutes have sex with clients.

Porn actor have sex, for money, with other porn actors, while someone with a camera records the proceedings.

So somehow the presence or absence of a camera alters the nature of the activity?

[grey_whiskers]

So somehow the presence or absence of a camera alters the nature of the activity?

Yep.

If it weren't being filmed with an eye to profiting off of the sale / rental of the filmed activity, it's a good bet that the activity wouldn't be taking place *nearly* to that extent.

Also consider the role of "fluffers."

If it were purely for pleasure, as in conventional prostitution, they wouldn't be used or needed.

Cheers!

[Raider Sam]

They are both being paid, and not by each other.