Question

I dont understand why so many people dont see the "view all groups" bottom

Answer 1

Great point =). We're considering some major changes in this regard.

Answer 2

Hmm well I didn't see it at first, I suppose its because your attention is immediately drawn to the groups themselves, so they just don't see it. Plus people don't look.. :P

Answer 3

I suppose it it because they are the most frequented and/or broadest categories.

And the MIT stuff, for example, is all very specialized and of no interest to most of the youngsters who need basic help with their maths.