There are a few problems with beeswax, given the very low supply and high demand the price of real beeswax is an order of magnitude greater than paraffin wax, so there is a very large incentive to at the very least mix in some paraffin. Also much of the beehive foundation sheets are made of adulterated wax.
But even if you managed to find some real beeswax, given that bees are collecting pollen from many fields that have been treated with pesticide the harmful substances tend to accumulate in the beeswax and the concentration increases every year if not filtered correctly, and given how hard it is to filter it from fatty substance you might end up with some in the wax.
Israel introduced a similar concept in 2017 that deposits a small amount of money monthly into a savings or investing account for each child, money can be withdrawn at the age of 18, or later at 21 with a small bonus.
Using these tools to mitigate spam is as likely a scenario as this, imagine that every spam mail receives a masterfully crafted response showing utter fascination and interest in SEO, or helping out a Nigerian prince.
Every phone call to an unregistered number is answered by an artificial, frail, and forgetful lady that is trying her best to register gift cards.
When reporting an e-mail as spam it will not only block the address but waste the spammers time, rendering the actions unprofitable.
https://news.ycombinator.com/item?id=37353770
https://news.ycombinator.com/item?id=35134751