Yes, Minecraft has MFi controller support!
Minecraft on iOS does support controllers and is compatible with the MFI standard.
Minecraft Realms auto-renewable subscription info: Minecraft now comes with the option to buy Minecraft Realms.
Realms is a monthly subscription service that lets you create your own always-online Minecraft world.
There are currently two subscription options to choose from depending on how many people you want to invite to play in your realm simultaneously.
If you cancel after your subscription has activated, you won't be refunded for the remaining active period of the subscription.
Minecraft supports MFi controllers.