Edit: both ends = b2b&b2c

Yes and no. Without a users video history (& other tracking turned off) best they can do is push random ads hoping it would hit one in a million. That is not effective and sometimes even diseffective (hitting a controversially opposite target). Tha harms YouTube on both ends more than the ad’s company

By pushing users to turn it on they apparently gain more than just pushing random horse crap.

Also interested