Disclaimer: This is my own opionion and does not represent Mojang.

Minecraft is one of the world's most popular game. And of all the game options, multiplayer is the most popular. But it is going to change. If you are a server owner, you should beware. Since minecraft 1.7.10, the server forces you to agree its EULA "End User Licence Agreement." that forbiddens you to let any payment such as donations to affect the games. Goodbye, Buycraft. Or in other words, it indirectly disables you to support your own server. Why this is happening? "Minecraft Realms". I hope Mojang will modify its EULA in order to let things operate correctly.