Why would someone trade a Dark Bridge or Psycho Bridge plus DTs for a PGF, If both Bridges are derived from using a PGF?
I can understand the obvious: unlike DM or DF, both Bridges are useless, but....
It Is what It Is
It Is good enough If you are able to trade a Bridge for a PGF. On the contrary: be thankful someone didn't use Its PGF to make a Bridge and traded It with you, If the case surges