I haven't had a tv in years, and every time I get tempted by the screen size I have to remind myself about this shit. It's just me, 30 inches is enough, and I haven't seen an ad within my own home since 2012 (not entirely true, I've changed browsers a few times and had to re-setup adblockers).
You can look for display boards, they're specifically meant for like retail space so don't come with all the fancy bullshit. Typically cheaper, and you can go pretty large as well.
In this day and age, they will charge you as much as they think they can get away, and then double dip with showing you ads, and triple dip with selling your data.
The "ads subsidize the product" line was real years ago. But as always, it's never enough.
Just look at streaming services. They started to show ads or make you pay even more to get rid of ads.