Lead arsenate was a very common pesticides for decades.

https://en.wikipedia.org/wiki/Lead_hydrogen_arsenate

I have “purchased” thousands of books from Amazon, but never given them money for a book.

They run free specials all the time. FreeReadFeed scans for them. It’s a great way to discover authors to purchase their books at another site or use the library apps.

This one is extremely difficult to fix as well. Ad companies bribe politicians with reduced price advertising for political campaigns to prevent laws being passed to regulate them.