And to be fair to the business people, it's not like they have much choice. There are no major privacy-focused ad networks and they need a source of revenue. What do you expect them to do?
"Finally, it is always possible that man, as the result of coercion or other circumstances, can be hindered from doing certain good actions; but he can never be hindered from not doing certain actions, especially if he is prepared to die rather than to do evil."
At some point a company may have to make a decision that results in their death if they want to continue to act morally.
But much, much more often they simply modify their morals slightly and continue on. We humans are great at that.
Aim them at the ad technology firms that set the ground rules for the industry decades ago. The publishers are generally not the ones who let it degrade like this—the ad industry, which set the expectations for advertisers and marketers, did.