Absolutely - And we already have this in the form of e.g. TV commercials, and, more recently, youtube sponsored segments. I vastly prefer getting ads relevant to what I'm currently looking at to something entirely different based on what The Algorithms decided I wanted to see.

But surely, there are car enthusiasts who read about cars that would never read an article about California wine, but would benefit from knowing about it.

In your world, that person misses out on the pleasures of california wine

This is an amusing example. I'd guess that car enthusiasts are aware of Sonoma for various reasons. I suspect they'd get some exposure to California wine inadvertently through that connection.

You can go to any gas station in the nation and walk out with a bottle of California wine for about $3.

You missed the reference: Sonoma has a famous race track; hence car enthusiasts already know about Sonoma and its location in California wine country.

I guess fancy pants California wine then. I know the valley grows a lot of grapes. I interpreted the thread as Napa /Sonoma

No, you seem to construct some kind of straw man where you can't randomly make ads for California wine? But you can. Don't use profiling, though.