there is a definite pattern to it, new members go through a learning curve of aclimatisation and getting to know other members opinion, those that learn that there is rarely a single best opinion and that their own opinions can live within the wider frame of things generally live longer and go on to become part of the bigger learning exchange,
the seasonal pattern lives within the broader one, closed season goes...things get quiet, banality and arguments replace the number of productive posts, perfectly normal