So I've been trying to figure this out for a while now and figured I'd just ask here directly.
I've noticed a huge difference between platforms that moderate actively and those that don't. The ones that don't tend to become unusable within a few months.
Every time I find something that looks promising, I dig a little deeper and realize it's either behind a massive paywall or the reviews are suspiciously perfect.
Feel free to share whatever has worked for you, even if it's not the obvious answer.