The problem is that other companies are trying to replicate a model. Mojangs model wasn't really a model, they needed money to continue the development of Mine

The problem is that other companies are trying to replicate a model. Mojangs model wasn't really a model, they needed money to continue the development of Minecraft. People really liked the idea of a voxel creative adventure game at the time and spread the word. Now the market is saturated with them, yet Minecraft is still on top. Expecting the model to play out the same again is stupid, because the original conditions that caused Minecraft to be successful have changed. At the time, Notch just wanted a game that played the way Minecraft did; he was focused on building something cool that played into his nostalgia.