They may want it, but it's Pavel Durov who makes the ultimate decision, and, knowing him as well as I do, I'd say that it's very unlikely he'll allow any semblance of tracking or targeting. He has no sympathy for surveillance capitalism and "growth".

Besides, as I said in another comment, ads will only exist in channels. Channels have already sold ads directly since about forever.

Also: https://t.me/durov/153