If you don't believe me, look up the price of a "commercial display" comparable to your tv. And before anyone asks, the majority of customers would rather have a cheaper tv with ads in the menus than a more expensive one without.
How can the consumer know, if it is not disclosed?
And when every TV manufacturer is doing "ads in your smart TV", there is no incentive to not sell it at full price AND show you ads.
[1] https://www.amazon.com/Philips-Monitor-Bdm4350uc-42-5in-3840...
You should disconnect your TV from the internet and not let it connect. Run a barebones version of Firestick (ideally with piHole) as it is constantly phoning home to Amazon. Roku is a popular alternative, but it too is constantly phoning home.
Two random articles, which includes coverage on the Samsung & Smart TV problem
https://www.cnet.com/news/samsungs-warning-our-smart-tvs-rec...
https://www.washingtonpost.com/technology/2019/09/18/you-wat...
This relates to Vizio[1] but it seems most manufactures are snooping on their customers.
1. https://www.ftc.gov/news-events/press-releases/2017/02/vizio...