For the most part, in any of the btc spaces online (as well as the crypto ones from when I was looking more broadly), most of what I've seen in terms of SF interest has been hard SF like cyberpunk, space exploration, some military SF, etc. Softer, more human interest-focused stuff (as well as genres like fantasy) just hasn't seemed as popular.

(This is entire my perception, not anything I've done any sort of serious analysis of.)

So for the most part, I haven't posted about soft SF that I've read (or about most of the crime novels or other things), just because I try to keep my signal/noise ration decent (and if folks don't care about something, even if I do, that post is effectively noise.)