While I was at the range this past week I noticed multiple guys with Zamp panels plugged into their Zamp-Ready RV's. Great marketing move by Zamp, probably gave the connectors away to the OEM.
Astute observation.
There are a few posts on this Forum of folks that have the Zamp connectors and asking if they're married to Zamp for modules. The answer is no, the Zamp connector is a typical 12 V vehicle connector.
I hope the guy that initiated the connector for different brands of RV's and got them installed, was rewarded. Like you state, a brilliant marketing idea.