In Chapter 10 ("Platinum and Palladium Prints," p. 144) of Laura Blacklow's New Dimensions in Photo Processes: a Step-by-Step Manual (3rd ed., Focal Press, 2000), the author states--in connection with her Sensitizer no. 4, which includes a drop or two of gold chloride--"if gold chloride is used, do not replenish the developer as suggested in the tips." Perhaps due to an editorial oversight, the tips don't mention replenishing the developer; nevertheless...

Why not replenish the developer if gold chloride is sometimes used? Is it simply to avoid contaminating other prints, which may not otherwise include gold chloride their sensitizers, or does the gold chloride compromise the overall effectiveness of the reused developer (whether Ammonium Citrate or Potassium Oxalate) down the road?