7 Things Every Facebook User Needs to Know, Backed by Research | TIME
Eric Barker stashed this in Diabolical Plans For World Domination
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Dunbar’s number says we can only sustain 100-230 friends.
It holds up online too; despite how many “friends” you have you’re probably only active with about 100-200 of them consistently. Facebook promotes mainly weak, low-commitment friendships anyway. And the main reason for un-friending is because somebody posts too much uninteresting crap.