On PPCG also old and already answered questions provide a valuable source for attraction of new answers and new users, which also supports growth of the site. Moreover, there are several barely noticed questions (often with only few answers) which are examples of good and noteworthy challenges.
According to its profile the user Community♦ does
randomly poke old unanswered questions every hour so they get some attention
In order to attract more answers also for older questions it might be an idea to change that behaviour to something like "randomly poke old (unclosed) questions".
It seems to be possible to do so but this would mean a feature request which has to describe the actual behaviour we want and why it is important for PPCG.
Therefore, please try to be specific with your answers such that we can get consensus whether we want something changed and in which way.