I feel kinda mix and match , but mostly seem don't?
Of course, using Facebook groups still works. You just have to know the best strategy for using it. And right now you don't have to worry because I'm gonna lay here what you could do to make Facebook groups work in your favor...
Here's some tips that'll help you get the most out of Facebook groups:
1) Make sure you understand your purpose of joining a Facebook group, make sure that you check out the group and see if it's a community you can and receive value from.
2) Make sure you're an active participant in groups. This is exactly why being in 50 different group is not practical. It makes it impossible for you to be an active member in that many groups, when you become an active member instead of being a spectator, great connections and relationships get formed! People will get to know you and vice versa. People always like to engage with real human beings not bots etc.
3) Make sure you put to use everything you're learning, the challenge that I see happening for many is "consuming" far too much information and not actually implementing any of it. Look, I get it, it's easier to just do what you've always done, however if what you're currently doing is not creating growth for you, it's time to start making those small changes. Implement the thing you're learning in the groups you're apart of! Trust me.
4) Start making meaningful connections, connect with people not to spam them with your link, opportunity or products. Connect with others in groups that you find interesting, perhaps you really liked their comment, checked out their page and liked what you saw! Make real connections with people without an agenda. Be real with your hustle.
5) Make sure you contribute valuable content in the communities you're apart of. Ask questions, join the conversations, have an opinion that is positive and constructive!
There's no value in being a member of multiple groups that you never engage with. Narrow it down to a few that really resonates with you, you will get more out of the experience that way!
Hope it helps.