Players will often see B2P as a cash grab, especially when it's already F2P in Thailand. Once you pull a trick like that, you will lose the trust of the player base, like it was with BDO. I think F2P is the best option.Because it will give a bigger player base at the start, and will constantly supply game with new players through out it's existence. Also F2P is Bad-review proof, since you can download your self and try it out. While B2P will heavily depends on game reviews for it's future player base, it's a big risk to take. As for the game financial success and survival, it depends whether they will copy Archeage or BDO model for West release. From what i have seen in Thailand few month ago, they were going with BDO model, but not sure how much it changed since then.