I don&#x27;t think they have enough power to dictate that kind of deal on the Internet.<p>It&#x27;s too easy for merchants to re-organize around another platform if needed. Amazon wouldn&#x27;t lose <i>all</i> customers to that service, but they would no longer be the <i>only</i> place that one buys stuff, which is pretty close to what they are now.<p>Going membership-only would simply leave too much money on the table for it to not be picked up by others.<p>Ebay I think would be ready to pick up the slack, if nobody else.