Coin pop manipulation

How do the tpg's keep the pop reports reflective of the environment. Stated another way: Being that many collectors crack coins out and resubmit them (2,3+ times), doesn't that give a false illusion of over population of a coin? Won't this hurt the values of coins, especially low pop key dates?
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if you had a low pop coin that you cracked out, it would probably be in your best interest to do so
Then buy 'em up when the price is down and send all your tags back in afterwards.
Voila, the pops go down and the price goes up again.
I can only see this working for condition rarities with very small pops (10 coins or less).
I've never heard of anyone actually doing it, but I am sure people have tried. It's not necessarily something you want to brag about, at least not in writing.
https://pcgs.com/setregistry/showcase/2819
<< <i>For the reasons mentioned above, the coin pop is not 100% accurate but can be used as an indicator of general "rarity" of the series >>
I was presented with this method on seated quarters recently and then realized that the majority of the dates below unc are low pop. One cannot really come to any general conclusions other than among the unc coins submitted. It's a guide, and many times not a good one. There are some series where in particular grades it's probably dead on. In some other areas it's dead off.
For comparing different series as a whole in mint state and unc/pf type coins it is very useful since the resubmission rates are pretty comparable.
roadrunner