Tree of Savior International server test going be after second Korean CBT. Schedules for Korean CBT2 going be published soon. Together with information about International server developers also published few new screenshots -
NXP - Nexon Points? I hope it something different and not cash shop points.
Funds - Ordinary money. (Gold in RO)
Durability, Potential, Sockets and Weight - Big chance that this basic things going be focused on cash shop.
When you get new level you can put points in stats. In last CBT they been not balanced and we can expect new changes for them.
Most game publishers/developers have they own servers in a real data centers. Also Amazon AWS cost a lot. I don't think devs ready for it.
If you still want to play in global test ToS server be sure to have Facebook or Google+ accounts since you going need them to register in Tree of Savior.