The key difference between the subscription and the freemium model is the scalability with flexibility. A subscription is a fixed value the costumer pays for. I

The key difference between the subscription and the freemium model is the scalability with flexibility. A subscription is a fixed value the costumer pays for. If you set it to low, you're missing the opportunity to make more money from users willing to pay more. If you set it to high, you run the risk of users who would still be profitable not buy it at all. Then you could try different tiers of subscriptions. But that only bandages the problems. Then came consumable virtual items, which automatically gives you infinite tiers of pay users. You can play the game for $15 a month, you can play it for free, or you can pay $3000 a month if you're willing to. And according to Zynga's report, many does, and that's where they get most of their money from. That flexible scalability is why freemium is replacing subscriptions. And that's why I think the auction house will take over subscription. Because not only it's a freemium model, but it's a genius freemium model. It takes the best of the two main types of freemium (consumable and permanent virtual items) and put them together. It doesn't put a limit on how much a user can pay you. And it's also very attractive to users.