I'm talking about the "the host offers a roof, pays next to nothing for a live-in nanny" arrangement, which locals don't do.
Interestingly the 26 refers to the USA. But a similar career would be legally possible inside the USA (not under the program) but not in EU, due to heavy labour regulations.
The appeal for foreigners is living temporarily in Germany, Switzerland, etc.
It's an exchange: the host offers a roof, pays next to nothing for a live-in nanny, etc.
It's tourism + work.
I don't think anyone would do this as a career, and locals just do it in another country.