Narrowband IoT is the target market for that. T-Mobile has a plan where a certified module costs $5 (There is a min order to get that price, but for a large vendor that's not going to be an issue) then $6 p/year as long as you can keep below 12MB per year. But you can keep bw down by shipping the fingerprinting software with the TV and only sampling a small section of the screen (Other TV Vendors have done done this in the past too) and create the matching fingerprints in your server farm (So no need to send a full screenshot to fingerprint the show.
The question is then would $25 added to the BOM cost per device be worth it to the manufacturer (Cost of the module plus 3 years of NB-IoT coverage). Though you could reduce that by getting a custom deal with the carrier where you only pay for data if you actually activate it, then only activate the module if the TV has been in use for X hours without phoning home using the customers own connection.
From a cost perceptive I think we are pretty much already there.