It should probably be the other way around from a product perspective. The box is super simple, it's basically a black box, and having some ISP serving you an

It should probably be the other way around from a product perspective. The box is super simple, it's basically a black box, and having some ISP serving you an ad instead of your video link would make it seem like it 'doesn't work' for most customers. A device like that is more likely to be returned than to go through support. However, if you're competent to care about which DNS server you use, or you're doing something like blocking DNS traffic that doesn'r originate from your DNS recurser, you have the capability to change the DNS settings yourself without incurring a bunch of support burden or returning the device out of frustration. There should be an option in the box settings that lets you choose, google, dhcp, or manual dns servers. Probably in that order.