I was wondering that once the MMO comes out will it be pay to play? Just wondering because I don't want to transfer a new character to the MMO server then find out I have to pay to be able to play it.
It will be free to download and test. You're paying for 1 character that you're transfering to the main island. But if you bought YO you will get ingame currency worth enough to do that.
Other than that you will have to pay for full game access for each new character you make. So generally it's B2P with a free demo on starting "newbie island" with heavy restrictions.