If you go to Reddit, you will still see their ads, be they obvious or hidden through disguising as user interaction (bots are more or less obvious, AI is at the stage where they can fake users). You drive engagement and site traffic. The only way to do anything disadvantegous to Reddit is to stop going to Reddit (if you also delete all your content they have less things to put inbetween ads for the remaining users). You are the product they offer to advertisers, be it through being the buyer for advertised things or providing content to put between the ads so the users who may buy those things don't only see ads. Your enjoyment of the platform is largely if not completely irrelevant from the corporate standpoint. If anything, your disgruntlement can make you engage more providing them with more content to put between ads.
Maybe not in the short term. Lots of the users who don't give a shit about the protests are just getting aggravated by that stuff, based on the comments. Casual users getting pissed off are more likely to seek out somewhere else for their non-vacuum entertainment.