This was actually pioneered by Bruce Willis. He would get paid a lot to show up in a couple of introductory scenes for really low budget films. They'd put his face on the movie poster, they'd pay him like half the budget of the film, then he'd move on to the next one.
(Unfortunately, it turns out he was struggling with dementia and it seems he was trying to cash out before he couldn't act at all)
>>habitu+(OP)
I watched some of those movies - my god they were terrible. I'm pretty sure Willis filmed his parts in front of a green screen because he was never in shot with other actors.
Knowing the reason why though, I don't blame or fault him for doing it.