I don't know if it is a bug or intentional but ellen joe and reze only give 60 coins for the last free tier scene where as tifa and frieren give 72.
For Frieren, that was intentional since she has more scenes than the other characters. But for Tifa, that’s probably a bug.
That said, the reward values are still temporary right now. The rewards balance is still pretty loose and will likely be adjusted further in the future. Thanks for the feedback!