Agreed 100%. Commenting - i.e sensible and "intelligent" (sorry, can't find the right word!) is also considered as authoring and yeah, sometimes could make you earn more than the actual post that you made. It also makes you more visible to the rest of community and in turn you create traction on to your own page eventually. You can also start gaining your following by commenting. A lot of many other positive things can be said about commenting. So yeah! Commenting it is! 😉