How much vacation days do GitHub employees get?

If you believe Glassdoor, it's "unlimited vacation time". Which makes things like this all the more important.

Doesn't it make things like this all the more meaningless? We know that "unlimited vacation time" can, given a competitive company culture mean "essentially no vacation time". First, isn't this then the same with wellbeing days(sure, it's the whole company that's supposed to be off, but who knows how it will actually work in practice). Second, wouldn't the first step be to give all employees 30 days of annual vacation and enforce that they actually take them? (This is what many organizations do in Europe...)

4 weeks of paid vacation is required by law in EU.