What I hate about spending in this game is that it consumes your paid diamonds first before the free diamonds. Drop rates for SSR are low much like other gacha games. It's a shame it doesn't have a step up summon promotion to get the character you actually want. They're currently offering a guaranteed SSR summon. Essentially, 20 USD for 1 10x pull. You still can't choose the character you like to get even with how much you're being asked to spend. Utterly outrageous.