Minecraft on Mac and PC has hit 22 million units in sales. It's almost two million units in six months time. The game sells between 10,000 to 13,000 units per day, the latter number being the recent one. So sales actually continue being very strong. It's been a while since the last total sales tally for Minecraft (54 million in June, 2014), but since the mobile version (Pocket Edition) has rounded 30 million in sales and the game has been released on PS4, Xbox One and Wii U. Don't be surprised if Minecraft hits 100 million in total sales within the next few years as sales don't seem to slow down much.
Telltale Games have also been enjoying a great deal of success with their episodic take on Minecraft - Minecraft: Story Mode.