There has been an overwhelming response with people asking how they can lend their support; and also how they can be in the game.
I have a Patreon launched that lets users pledge a monthly donation to assist in the development of the game and get cool rewards in return!
Character slots will be added again in the near future.
See here: www.patreon.com/majorminor
NOTE: If you already own the game you will still receive a Steam Key for supporting, hopefully to give to a friend.