I do understand the difference, thanks. I think the degree to which it's a scam depends on the employer. Some say they have unlimited vacation and then the work culture discourages using it. Fortunately, that's not the case where I work.

The other benefit of not-unlimited is having it paid out when you leave. But if I had 6 weeks a year PTO, I'd just use it all anyway, so the part where it gets paid out isn't a big deal to me.