Hey there Queenie, I see you didn’t get an answer to your asking about the signed guitar.
At each concert the Shriner’s did a raffle of one signed guitar. You bought WASFE for $20 (I think) and got a raffle ticket for the signed guitar. At the end of the concert after John and the band had left the stage, the winner was announced. I don’t remember exactly how it was phrased by the head Shriner guy who made the announcements but the raffle was to benefit the causes that the Shriners support.