That's for monthly blankets (which I guess is, in fact, at the chapter's discretion). Event Points (event blankets) are 30 per logistics period.
ARB:
Event Points: You may trade in your Goblin Points to receive Experience Points for any event your character did not attend. These Experience Points can only be awarded if your player did not receive any XP at that event. For example, if you were an NPC for a weekend event, you may use your Goblin Points to buy Experience Points for your character for that event. You cannot do this if you were a PC there. The Goblin Point cost for Event Points is sixty per regular event. A long weekend will cost ninety Goblin Points. Remember that you can only get these Event Points if your character did not attend the event.