In that case because I couldn't think of any that were a major component. Which I suppose is a side effect of their scale my mental modeling. Facebook getting

In that case because I couldn't think of any that were a major component. Which I suppose is a side effect of their scale my mental modeling. Facebook getting other social networks is cognitively equivalent to roughly an additional third each without checking the numbers - both are big known names. Google and getting YouTube is an influential chunk of their empire even if low margin from the expense - say an additional third of their "main product" along search and Android. That is probably why I couldn't remember others.