In the latest developer Q&A posted to the official site, the Tree of Savior team speaks about server closures designed to create a controlled environment in which to research and implement anti-bot / exploit detection measures. Once these are in place, they've written, servers will be reopened.
The Q&A covers several other topics including:
- client and server lag - a pair of updates are incoming to help improve performance and server resource leaks are being addressed
- rank 8 classes are in the works but not ready for more information to be revealed yet
- reiteration that monster cards will not be tradeable
- no plans to make a master list of approved add-ons
- the team is considering further housing / guild castle customization options
Check out the full Q&A on the Tree of Savior site.