My guess is that it's accurate, and that Amazon still considers it to fall within their promise of a $15 minimum wage, just like the federal government and some states allow restaurants to pay less than minimum wage to servers who get tips – only in AMZ's case instead of tips it's RV parking.

https://en.wikipedia.org/wiki/Tipped_wage

Wifi and power extra, shit pump and water free for prime members.

They also list witholding a part of their wages until they've successfully completed the season.