In a press release Square Enix boasts over six million copies shipped and in digital sales.
The exact numbers on both shipped copies and sales were not given. It is known that Square Enix had 5 million copies shipped to retailers at launch. The 6 million in digital sales is also the only sales number given out.
It is difficult to tell whether this means Final Fantasy 15 made a profit or how much. The developers did have a personal goal 10 million copies sold however that was not the number needed for the game to make a profit.
In the same press release, Square Enix announced the Moogle Chocobo Carnival for Final Fantasy 15. They describe the event as “a special in-game event that brings an exciting festival to the whole city of Altissia”. The event will come with the holiday update and begins on January 24. It will be limited time event however the exact details and dates of the event were not given.