Ok, I don't want to be that guy, but if you don't do anything to block the ads outside of making changes on the TV, upgrades to TV OS can discard the changes you made. If you are using the internet for streaming, it only enhances the blocking of ads by not even allowing that communication. In this instance, excluding the domains in your DNS server, no matter what it is.
You can do any or all of the following:
1 - In the TV network settings point to a different DNS server like OpenDNS and use that to block the ads coming into your environment.
2- Setup your own internet DNS server. Asustor NAS' come with Adguard which can block all known ads on every device you point to it.
3 - On your internet device's firewall, drop all traffic from ads from Samsung. If you aren't sure, you can find out your TV's IP and filter the firewall logs to see what is communicating to that device and block those locations that are ads. You have to take care because you don't want to block your streamers. so look for obvious things like ads.samsung.com
I agree, there shouldn't even be an issue with ads on a paid for TV, but because you are pointing your TV to the Internet, ads is something you have to deal with on any website. So this problem/issue really isn't that different, is it?
Furthermore, to help you protect your TV from maleware and potentially hackers gaining access to the account information for your streaming services, it wouldn't hurt to treat the TV as any other Internet device that can be attacked by people with malicious intent. Tizen is a secure OS, but it only takes one hacker to find a vulnerability and exploit it and render your device useless.
So maybe think of this as a security thing, not a Samsung money grab thing (which it is).
