The original Early Access plan of Tree of Savior isn't going to work out because of the one month gap between different packs. Now imcGames is bringing out several new plans, asking the community to vote for their favorite one. The first plan only gives 7, 4, and 1 day's early access time although it includes many in-game rewards, and another one has the same early time for different packs but gives different rewards to different packs. The third one is the one announced before.
>> Tree of Savior international version launches on June 19
You can see the 3 options below and vote for your favorite one at the official forum.