Yea you get a free 5 star ticket, don't remember which day so beside the free 5 stars they give i.e Beni, first multi Shuna, I only have one 5 star which is Millim, so I have done 15 multis with no 5 stars.
I know its dumb but I wish there was a unit injector to play around with team builds, I also get shafted pretty hard I'm on like 15th multi with no 5 star