One explanation: * People who buy video games on amazon and don't have prime aren't likely to get prime. * They're losing money on the free shipping offer (give

One explanation: * People who buy video games on amazon and don't have prime aren't likely to get prime. * They're losing money on the free shipping offer (given video games tend to be >$35, may have thinner margins than other products). I'm not saying this is their reasoning, I'm just saying it could make sense.