What are /r/ReadingGroup's favorite Products & Services?

From 3.5 billion Reddit comments

I've never heard of those. I signed up for thestorygraph to see what it was like. I didn't see anything in there that would let me easily find another person who wants to read the same book that I do, or match books by their "to-read pile". It kind of looks like a clone of goodreads.com but just with a cleaner better UI. As for reedzy, I couldn't find that. I only found reedsy.com and reedz.com , both of which don't seem like a general reading list where I can match with others who want to read what I want (at least in a very easy way).