I don’t have data for how much tvs are currently subsidized. But you can just look at the inflation adjusted price of TVs from say 1980 to 2010 and see the drop without worrying about adjusting for advertising and spyware subsidies.

You can also look at computer monitors (which don’t have advertising and spyware) and see an enormous price drop.

Edit: I found this which estimates you can make about $100 in ads and data collection over the lifetime of a TV https://omdia.tech.informa.com/om030986/in-the-smart-tv-indu...