Regium spent a fair bit of money (10s of 1000s) in ads on chess.comm, chess24.com and at least one magazine (although some of the ads might not have required full up front payment) and the videos and website would have either cost money or time plus software.
chess.com had live ads read on streams by presenters, the presenters looked and sounded really sceptical it was legit, didn't stop them from taking the money and advertising it to their customers, though.
I think $10,000 is a reasonable figure. $2000 on chess.com (assuming that's correct) and let's say $2000 on chess24, a full page magazine ad that might not have been paid for, some expensive chess boards and chess pieces. translations, maybe voice overs. There was a video of actors endorsing it.
Since the website and marketing are totally anonymous/fake people, the ad buys and Kickstarter likely were fake IDs also.