Public Sponsors:
AEBN - Build your own white label VOD site with public content.
Cash Maniacs - My Outdoor Shots, Nature Bondage, Public Fucked, PLUS many more ManiacPass sub-domain public sites.
CashDorado - Banged In Public
Fuck You Cash - Public Violations
IdolBucks - Japanese Flashers, Outdoor Jp and Public Sex Japan.
JuggCash - Asses In Public
Kinky Dollars - Public Disgrace
LegitCash - Public Flash and Trashed Chicks.
NBBCash - Berlin Public Bangers
Payserve - Public Place Pussy
Pimproll - Wild Party Whores
Sextronix - Amateur Sex Outdoors, Beach Erotica, Public Sex Club and Teen Sex OutDoors.
Voyeur Cash - Fucked Outdoors
WTFBucks - Porn Weekends and Public Sex Adventures.
ZetaCash - Naturists
Also,
Serious Partners has PornTraveling which has a lot of public sex content, but not exclusively outdoors.