Facebook, as with many inventions came with its hype and allure which makes it the most visited site with the highest numbers of members and arguably traffic.
Now, the burden of the problems facebook initially helped to solve is being currently shared with many sites and hence; its allure. Sites like twitter, instagram, nairaland etc is trending especially in Nigeria.
I do go several days without opening my facebook account but Nairaland? No! It has become my second name. I seem to forget every other things when I go through Nairaland pages. You nko? How often do you use your facebook?

Its near redundant

Very rarely.

I check it once a week. That place is filled with kids

^^
True