I mean the overall give-back charms or refine packs are kinda good, as ypu spend it also gives it back, thats great. But like bond packs and bells in refine rebate could be changed into some potions or myobouku packs, everyone also needs regular/advanced experimental and protection vials that could be a thing also, the rebate events also could be changed to being similar to cave key rebate, the more you do the better rewards and you also get attemps at spinning and at certain point you get a big reward in cave key rebate case you get golden treasure essence which is really rewarding, similar stuff we would like to see happen with other rebates, if it gets changed it would be awesome.