I read another book along similar lines called If We Burn, which was a broader look at the 2010s protest movements that sprung up from online activism. What I took away from it is that most of that activism was hollow and didn’t have a political vision or party program, it was just the masses shouting “No!” at their shitty governments. It was also easily put down once people in power got used to it.
Oh I absolutely loved it, don’t get me wrong. I lived through that decade as my own political awakening, so every single event described was something I watched super closely and posted about and participated in as part of the online activist space (and sometimes in person!)
Your observation that the social media companies can leverage and benefit from these protest movements (and perhaps even create them) is important, I think. It’s probably why Musk bought Twitter, he wanted to wield that kind of power over the masses and their ability to organize. It seems to have worked, too. We don’t see anything like what we saw in the 2010s these days.