I have $100 devices in industrial devices that have them. In bulk, they cost next to nothing (not quite as cheap as RFID but getting there).
replyBut in your scenario they are an integral and necessary part of the device, so it's costed in.
replyIn a television it's an added cost and it's unclear if serving ads really can offset that extra $25-100 of hardware (and included data) you ship on a $200-1000 television.
It's also unclear to me if the low data packages they come with would be enough to serve meaningful ads to begin with. Those devices usually come with a fixed plan of 100MB/month for 5yrs (or along those lines). Modern smart tv ads are very often video or at least hi res images.