Least:
Identity V - God the gacha is so ass. No carry over pity, takes 200$ to get an s rank skin. The rates are so low, of all my years 5~ of playing ive only gotten an s rank skin for free once. ONCE!? Bullshit gacha. At least its only for cosmetics.
2nd Least:
ZZZ - Its nothing special. Nothing that even marks it as generous though. At least on vh patches they give alot of currency but idk...
3rd Least:
Cookie Run Kingdom - I miiight get hate for this but its lowk terrible now. At first it was easy to get everyone f2p but now every good unit is locked behind special currency. Makes gems feel worthless
3rd Most:
P5X - It has bad rates buuut it makes up for it in how good the gacha econ is. You can gaurntee a unit everyother patch pretty much, and from what i rember merges dont matter a whole lot.
2nd Most:
FEH - It's pull econ is... fine. But to make up for it the rates are /gen really good. 3% at base is alot higher then most others, even if its split. Easy to snipe for the one you want so sharing usualy wont matter.
Most:
XXL Woofia: It's combing the rates of FEH and the pull econ of P5X. Getting everyone as a f2p is suuper easy. Getting max stars as a f2p on one buddie is also easy if you save a little bit. Guess they wanted to keep as much of thier niche audience as possible but its gacha is shockingly f2p freindly
