I honestly have no idea how I have friends on Goodreads. Maybe four or five of them are people that I know irl and talk to about books. The rest seem to just appear. I’ll check one day on a whim and the number will have gone up by a dozen. The functions I use Goodreads for, though, are to take little notes on books and to write reviews (because I find it fun to do so). Everything else is superfluous so I barely interact with people on it at all, beyond maybe making a note specifically for one of those four or five people I know irl about how much they would like a book or passage or whatever.