4 (b) Periodic payments related to accounts,service and content:
NCsoft may require you to pay to establish or maintain any account , to use any service or to use any content.
You addirionaly acknowledge that NCsoft may requires sush payments in any basis is deems appropiate including but not limited to any per-use or periodic basis (such are a number of hours, days or months)
There leaving the door wide open to start demanding use to pay to play (aka like WoW) instead of Free to Play.
I hope that never happens, because if it does i'm gone...