Forced posts go a long way
If you are not interested in posting, putting more effort and thought into your posts will only make you tired and bored, even if you keep a required level of "constructiveness". I'd rather say you shouldn't actually put a lot of effort in your posts. If you are truly interested in the topic or some post stings you to the quick, it won't require much effort on your side to write a refreshing reply or suggest an interesting idea