Cellular providers aren't giving LG a cellular modem for free, esp. 1Gbyte/day. Unless there is going to be something that causes cellular providers to give away data, it's going to be a significant cost.
The only sustainable ways for this to work is:
A) for the data for LG to collect to be worth what it has to pay to the providers. Aside from hopefully unlikely things like LG collecting audio and visual from hidden devices on the appliance, What the hell could anyone collect from a dryer that makes it worth it to pay for a cellular connection to your dryer? Is when and how much I use a dryer worth $30/month on a 2 year contract, for example?
B) for LG to charge you a subscription to use your dryer. People won't do this dumb shit for a dryer unless the dryer is not sold to them, but rented for like $30/month--with free installation. Even then, if the monthly cost is over a certain threshold over me going down to the laundromat and putting quarters in machines there, people won't do it--last time I did laundry at laundromat recently it was $4.25 to wash and effectively $5 to fully dry and that doesn't include soap and dryer sheets.
Now if you throw in a bundled detergent and fabric softener and dryer sheet subscription on top of it, and a free service if anything goes wrong ... it might work. And then ... maybe it is worth it?
$55/mo for a free dryer and all-you-can-eat soap, softener, and sheets--brand of your choice. Like commercial copiers/toner--well, imagine if it was "pay per load".
I mean we're probably going down the road of--in a few years or a deacde--manufacturers being so cheap and the middle-class-eviscerated consumers being so disempowered and poor that it ends up being you have to replace the dryer every 2 years anyway.