Bookwyrm is my favourite social media, though I don't actually spend much time on it. You've got to follow a lot of people before it gets interesting, but even then, it will never be popping.
Just to get prescriptive for a moment: If you check it obsessively you'll be very disappointed. But if you just spend some time with it only whenever you're logging some book update, then you're more likely to find a satisfying cadence.