Another social network, which I have found interesting, and where I have created an account, is called Letterboxd. It has many attributes similar to IMDB, where users can create lists of favorite movies, review them, like them, and create watchlists. Furthermore, just as with other social networks, users can follow each other. However, users cannot message each other. Thus, this website could be considered as an alternative to IMDB.
I would spend time on this website. However, I do not have much free time. Thus, this account is currently dormant, until I have more time on my hand. Still, I would recommend people to use this website.
I would only allow people, whom I know, to follow. So, if I know you, feel free to follow me.
Here is the link to my profile:
https://letterboxd.com/pliutkus/