Wow, that's pretty amazing it has survived so well and that a 10c comic can be worth thousands now. Rarity adds value.
I'm not that old, but I remember seeing similar little ads in comics when I was a kid. Not sure what comics it would have been, but there may have been some American ones around. I do remember some for 'sea monkeys' that were really shrimps.
You’ll appreciate this then. Lol
https://boingboing.net/2008/11/03/mans-account-of-orde.html/amp
Wow. Amazing that was allowed even then. Mind you I know the US has issues with various pets that have been let free. We have non-native terrapins in some UK rivers now after the Ninja Turtle craze.
Madness.