One more Subaru Ambassador here!
You also get $150 credit every quarter to order swag from their site. It's mostly miscellaneous promo type stuff for you to give away. They just ask that you check-in every month and let them know how many Subaru related interactions you've had (like a 1 minute survey). They don't have any specific requirements for staying in the program, other than checking in every month.
Here's their site: https://www.subaruambassador.com/