Talk:Jack the Ripper/@comment-220.244.130.150-20151218020508/@comment-114.108.221.220-20151221102712

Ahh well, a lot of the rules established in any of the series are ignored for the sake of game balance (very shoddy and questionable balance though considering Heracles is so fragile due to berserker class mechanics). If the game did do so, the rankings of the servant would change quite a bit.

Someon's already mentioned it, the 5 star servants that weren't introduced in FGO itself are all highly sought out servants, those that are extremely popular with the fanbase. Hence, in order to maximize profits, its only normal for the developers to make such characters into 5 star servants that would likely require either absurd levels of luck or a lot of money to obtain. Usually the latter

Considering how much some are willing to spend, it's a rather effective tactic.