Yes, I’ve done this for years. And to be honest, I don’t think I’ve ever “caught” a business sharing a service when they shouldn’t have.
Makes me question why continue to do it.
I don't think all or most of these companies on the list are intentionally selling my address to spammers. I suspect most of these leaks are due to poor handling of the data or server compromises. (Surely Adobe, for example, isn't so desperate that they would sell my address to spammers.) But whether by malice or incompetence, I can easily block them.