The Tree of Savior team has posted a new note on the game's official site to give players information about the recent spike in the prices of Founders' Packs. Players were able to purchase packs in other regions where prices for Founders' Packs are lower, then purchase tokens and resell them on the market for silver thereby giving them an advantage in regions where the prices are not discounted.
To help combat the issue, prices have been raised and the team has requested that Steam change its policy for regional pricing to equalize bundle costs across locations.
In addition, a South American server will be opening and team transfers will be opening as soon as next week. Additionally, different prices will be applied to South American and SEA servers and tokens will be ineligible for trade on EU and NA servers.
Lastly, we’ve decided to raise the discount on our DLC products. We will be selling them at 50% off instead of the 30% originally planned. The content of the DLC products including the TP amount will not change. Players who have already purchased the DLC products previously will be able to buy the discounted packs as well, since they are treated as new products. This discount will start on the 21st as planned and will remain available until near the F2P transition date. These 50%-off DLC products will not take regional pricing into account as they will be discontinued before F2P and regional pricing implementation for the SA and SEA servers.
As a result of the above, the F2P launch of Tree of Savior has been delayed until all of the measures mentioned above are in place. The anticipated release window is early- to mid-May.
You can read the full letter on the Tree of Savior site.