The Tree of Savior team has posted a short notification to announce that Founders' Packs will be removed beginning May 10th with the F2P release of the game. New bundles will be made available in 100TP / 300TP / 500TP amounts but will be limited to use in the region in which they were purchased.
In addition, a new Telsiai server will be opening due to overcrowding and other regional servers will be added as necessary.
You can read the full announcement on the Tree of Savior site.