This is veering a little too close to trolling plans for my liking, but I'll entertain any possibilities I can think of.
Brianna herself is a dead end, obviously. Though she'll again probably rage at some harmless comment somewhere and piss off a few more diehard fans.
The Patreon backers that remain could ruin Brianna's mood by asking to see what game development she's up to (none), or by again asking where the Natalie is. Unfortunately, this is also a dead end as any backer here who is brave enough to stand up to her will just get their social media presence dogpiled and libeled. Plus, it does nothing in regards to Revolution 60, since the backers of the Kickstarter most likely are not the few remaining backers on Patreon. Though, should Patreon change their service so that it's harder to artificially inflate the number of backers, that would completely crush Brianna's ego, but they're not going to do that because it's free money and Patreon isn't stupid.
The Kickstarter platform isn't going to do shit, period. The money has been raised, they've got their cut, now no fucks will ever be given. The backers of Revolution 60 likely fall into two categories; people who will start frothing at the mouth at the mere mention of GooperGrape, and those who have forgotten they backed the project. The first group will insist that we've always been at war with Eurasia, and the second is probably beyond caring. I'm not too familiar with the Kickstarter platform, but I'd guess there's no way to contact the backers, and even if one could, they'd likely ignore any messages because it's from some random on the internet. I'd advise against trying to stalk the backers and determine their accounts on other forms of social media because that's creepy and for once Brianna would be right with her crazy statements about people on the internet going out of their way to ruin what's left of her reputation.
So we're in for a long, slow fade into obscurity baring some drug-fueled incident where Brianna does something so outrageously stupid and offensive that nobody can even consider taking her side. Better stock up on popcorn.
