Brave Frontier

There was definitely a rate up on those units. Most of the people on reddit didn't think things through logically and/or expected the usual 20-30% unit rates (which would be absurd for units that only appear with rainbow door/light). Looking at the megathread, the total chance for a 7* unit was around 9%. Given that the RS gate chooses rarity first then unit it should be clear that 7* will naturally have a much lower chance of appearing: any 4* summon is automatically precluded from being a rate up unit. If only rainbow door rates were up one would expect the 7* rates to be much lower than 9% cumulative. There are hundreds of RS units with 5 and 6 star forms. (6 / hundreds ) * chance of rainbow is much, much lower than 9%.

Edit: And servers are down again... I'll be thankful for the compensation some day.