I am your father

Because they reworked older characters - then proceeded to release characters that made the reworks underpowered. So the older, reworked characters have to be reworked again to make them viable. But instead, they are simply going to release 2nd, 3rd, 4th versions of said characters, so you have to pay to level, gear and star them. You're welcome.

Just practice saying "Thank you CG!! May I have another?!?" in your head.