During the first two waves of figures, mail-ins were common, with two promotions spanning both waves. Strangely, no mail-in offers were used as incentives for the third wave, either because of waning interest in the line, or Kenner already felt the line was established enough not to need any.
Exclusive to Wave Two was a Clark Kent figure. This was apparently to be released on a card in the fourth wave, but as that wave was never produced it was only available for 5 proof of purchase seals.