If you believe that investors don't look at non-revenue metrics like MAU you are sorely mistaken. In fact, it's almost all they care about in this category. Twi

If you believe that investors don't look at non-revenue metrics like MAU you are sorely mistaken. In fact, it's almost all they care about in this category. Twitter's stock is in the toilet because their user growth has tapered, whereas Facebook continues to grow at a healthy clip.