Sometimes we give our opinions in the hope that others will agree with us. Other times we give our opinions hoping to influence others, swaying their thoughts, hoping they will see that we are indeed right.
As for why people post lots, we really have no clue and it shouldn't be of any importance to us. Individuals' circumstances change from day to day. Some days they may feel like spending time with their cyber family on TOTV, other days, different things keep them busy.
My opinion and I'm sticking with it....