It was most likely his readers that started calling them wong teasers, not him. And....why would someone with a PHD from Stanford become a mailman? I think you may have Arnold Snyder mixed up with Stanford Wong.
In blackjack, wonging is standing there counting the shoe without playing until you get a positive count, then sitting down and playing. Wong put forth the concept in one of his books but he did not call it wonging. His readers that actually put the concept into practice started calling it wonging. To counter the wonging casinos started barring mid shoe entry.
I'm sure "wong teasers" got the name the same way, from his readers.