Why would Dev take 3 cover main characters out that hooked players with the game, until all other minor characters get content in the first place?
I mean, Patreons paid for the game and vote with free will, so if they choose the same characters again and again that mean that they enjoy the content including these characters, being delivered that much.
If others don't get that many votes, then these characters don't interest the bigger audience that much.
Don't know how it hurts the game tho, it's good business and people get what they want.
So overall i think that it's cool that ICSTOR is adding sneaky additional content for character of his choosing even tho i would be 100% fine with 3 main girls only being around, it's good that in the long run everyone will get what they wanted.