Not anymore. Currently JPM cardholder + 2 free guest. Of course you get unpublished UC membership and UC member can bring unlimited members of immediate family (i.e. spouse + minor children) into a UC lounge (not PP). Personally I find this more valuable than PP but it depends on your travel patterns. More info on the JPM master thread in this forum.

As for multiple PP cards I just write which credit card on the back of the PP card. You don't really need to carry more than one PP card unless you plan to try to admit >2 family members. Some lounges are very strict and l limit you to one PP card per visit (i.e. you can't use a 2nd card to bring 2 additional guests). Other lounges do not care as they are happy to collect the additional guest fees from PP. It is hit or miss. I also have a PP app on my phone.