You can only select characters who would be willing to have sex with strangers.
It is a game that is constantly updating and changing, although I wish they could keep their save states, due to improvements and changes in the maps cause many errors, it is always advisable to start a new game each update.
The OC's of Patreon are a way we have to thank the people who contribute monthly, without them FireStarter would stop receiving updates, the characters OC's of Patreon are only decorative and have no importance in the canon of the game.
Literally in Maiale's store it specifies who the gifts are for, this update seeks to give another option besides farming with gifts.