Vanity Plates Of The Month

On a Mercedes: MY BET. I don't think Mercedes makes a BET model so I assume some gambling was involved.

On the same day: PEAANUT and PNTNO1. Wonder if they know each other.

PIANST.  Hey, you paid for seven letters, why not get the entire "pianist." Or is there message "there's only one 'I' in Pianst."

APOCLPS.  Now?

MSTRBIL.  A fan of SNL?

GOTRING.  Engaged?  Or a Wagner fan?