>but 5g was built with the idea of making them cheap

For bandwidth, maybe. It's still going to add cost to the BOM. They'll have to recoup that somehow. Say a 5G modem costs $20 (random number). For it to actually make money, it'll need to be otherwise not connected to the internet, otherwise it can just use wifi instead. Out of 100 people, how many do you think won't connect it to the internet for privacy reasons? 1? 5? 10? Keep in mind, if they don't connect to the internet, they'll need to go out and get another device to watch netflix or whatever, so they're highly incentivized to. Say 10 out of 100 don't, and with this sneaky backdoor you now can sell ads to them. For that privilege, you paid $200 per disconnected TV, because for every disconnected TV with a 5G module, you need to have a 5G module in 9 other TVs that were already connected to the internet. How could you ever hope to recoup that expense?

assume they are aiming for $1 in large quantites. I don't know thier number but that is closer. And the cost will be low because they are bulk buying excess data. They can send this at 3am when everyone is asleep so cell companies can give a deep discount.

again the above is the plan, reality often changes.