To my knowledge, they were always 1.5k Pero, regardless of event. Some thread dated a bit of time back was questioning the cost-efficiency of N Gacha tix vs N wild cards and trying to take into consideration the statistical chance of an N Gacha drawing a R/SR to compensate for the 50% greater cost and determine ultimately if it was more wo-
I stray.
In general I've never been particularly fond of Gambit events, primarily since on top of SECs, you still need gold-shop items like radars/glasses on top of peronamin to get an edge on others whereas other events like Shards or EG/SEG or Coliseum generally let you get by with recovery items only.