no one likes facebook anymore - I got approached by 3 big game publisher via the "indie game players & developers" Facebook group and got around in total 400 WL additions in 1 week after using pixel art & Xcom Facebook groups(maybe you are next level and you have double numbers in which case Kudos to you but this is still a good result for an indie dev like myself)
Many groups now have reddit like rules - Good, because I was really tired of my post to be lost in a sea of bad games link spams. It is so much better now, again what works for me it may not work for you
its a waste of money to spent - as I said, I strongly suggest free marketing for Facebook
people hate facebook - again, hate the game, not the player, all good PR agents will tell you this