Found a different variation of the 3rd issue purple VSP Players Club card from the Peppermill Casino in Reno, NV with PPC on the back and the reverse phone number is "Peppermill Slot Marketing (702) 689-7282". The difference is there is one card with the PPC mark on a single line and the new found card has it on TWO lines.

Here's scans of the backs of the two variations following the common front.