From Elon Musk’s other products, it doesn’t seem he is a fan of the advertising model.
Trapped in a 3 ton metal box for hours seems the perfect time to force feed ads, and yet… nothing
Nothing /yet/
Given Tesla has not done this for years, I think you have to give them credit for not being stupid. Not every organization wants to create an ad infested product.
I think their aggressive anti-repairability it's pretty stupid, so I don't think I will give them blanket credit. I would bet a sum of money that is fairly large to me that by 2034 they will be showing ads in some form of they are not defunct as a company.
I also think they absolutely will, once they get the actual full-self-driving figured out.