Someone help me understand the Icee Bear pop report

[jcardstore]

So with the unreal price explosion of worthless modern bass I’ve decided to start refocusing my collection on Cavs and vintage PSA basketball. One of the sets I’ve been researching is the 72 Icee Bear set.

Based on the limited research I’ve done these were printed on really flimsy stock and not super widely distributed (not positive about this piece).

I looked at the pop report and most of what’s graded is 8 or better. The Kareem for example has 542 total graded and 311 9s which seems absurdly high.

Is there a particular reason for the weirdly high pop numbers for this set?