Just bought Exi again! I know its not much, but I'll go through the others that I hadn't yet here or on steam attained and help out.
On the matter of keys... yeah that would be the real downside in so doing whilst operating independently. I'm just trying to think of ways not to have your dream taken from you nor these stories end in this way : ( but at risk of sounding too para social, i'll stand by you no matter what.
Will report then. I would also advise in that instance you also contact the site admins and not just the posters! I likely wager you have already, but if legal action is to proceed, you must take all possible avenues of publicly and privately, with copies, making the poster and site admin crystal clearly aware the copyright holder (You) wish your image, creative property and characters reserved from public, non acquired/paid/owned view.