This article is wrong to assume targeted advertising requires complex machine learning algorithms. Here are some personal examples where my ads have been poorly targeted:

- I'm actively looking to buy a house for more than a million dollars, and I'm signed into my real estate app using my Google email address. Meanwhile YouTube is showing me ads for Candy Crush Saga.

- A week ago I almost bought an iMac on Apple's website but bailed at the credit card payment screen. I had logged into my Apple account with my Google email address, yet since then I've not seen one ad to suggest I should buy that iMac (although I do see Apple ads for iPhone on Twitter)

- Twitter kept showing me Disney Plus ads even after I signed up

- In 2019 on holiday in Bali I saw YouTube ads in Indonesian, despite being logged in and being unable to speak that language