I'm in the same boat. Recently quit LinkedIn too and am working on my github.io page for people to contact me for potential opportunities. Have no idea if it'll work out or not, in the long run but tbh, I feel a lot better not being on these sites than vice-versa. Just my 2c :)
My (early career, not notable - hang on why am I doing this to myself :)) CV is hosted on GitHub, FWIW I have had a few people contact me as a result.
Sample size is small and it's anecdotal anyway, etc., but I do think the quality (of all of them) is much higher than the average I get through LinkedIn. I think it's certainly worth doing.
(And if you want to or have already written it in LaTeX, feel free to use the Docker image & CircleCI config I created for the purpose.)
You know what..when you put it like that you make a lot of sense. I too get most of my reading done this way. Through cross-posting on HN or /r/ or mastodon.