If I'm being optimistic, they're engaging with a community, who actually loves the RV lifestyle, and wants opportunities like this for limited periods, so they can save up for their "next adventure". I just don't know how working 12 hour shifts while living in an RV is called an "adventure". But hey, that's marketing these days - everything should be (over)sold.
My gutfeeling tells me, that the first is more likely to be the case than the latter, which is just another bad mark in the book for Amazon...