Now we're into some game theory. Perhaps the best thing is for the group to reject Prime. (assuming your premise of price hikes after putting little guys out of

Now we're into some game theory. Perhaps the best thing is for the group to reject Prime. (assuming your premise of price hikes after putting little guys out of business is Amazon's plan; they could also just push suppliers downward, like the duopoly of supermarkets in Australia currently are) As an individual, you are likely better off taking Prime until it is no longer the best deal.