Pay It Forward, as NamesJay conceived it, had a different aim – it turned into what is now, but it was not meant to offer "valuable" things in the first place, just things you did not need.
They serve two different purposes, problem is PIF has become similar to the Giving Thread, but should not be, as it should just go with its initial intent, and if it stalls, it stalls, until someone offers something he does not need and restarts it.
It was not about value, while here value (by whatever means) is taken into account. They both have reasons for staying, but the section placement is debatable, although we should have the moderators' opinion, maybe?