In practice, the “co-op” stuff really just amounts to a run of the mill rewards program. I can’t tell any actual difference between it and various other “loyalty program” thingies, aside from that they force you to join it to buy anything from them.
I doubt anyone really cares, and it's not open nominations.
https://www.rei.com/help?a=Can-I-receive-my-Total-REI-Reward...
That's pretty lame.