Saddly enough, but only in the CN servers has been implemented the 3 star BT, as far as i know. Many other servers has this 4 star type of BT, many other servers usually gets better rewards on events, like, we just relly on some old topics of content that we, at some point, as veterans for example, or whatever, need to start playing in the newest servers to feel a bit better about playing this game again, starting from 0. I dunno