Unfortunately the Smart TV hacking community is not that active.
It is a bit more active than your links seem to indicate, but is not very well organized or easy to find.
Use https://cani.rootmy.tv/ to check recent status of rooting LG TVs models. Many slightly older, 2+ years old TVs are still rootable, due to this exploit from 2024: https://github.com/throwaway96/dejavuln-autoroot
Even worse, IMO, than the high initial price is the fact they charge a subscription to continue to use the cooling cover you already paid an arm and leg for.
Is the man named GOB? in his 897 thousand, five hundred forty five dollar [law]suit! Come on!
Or just get a perfectly normal, average salary, like this single parent with 2 children the wallstreetjournal posted about in that same year:
Had to look up what a few of these were myself, check the sidebar resources: https://github.com/awesome-selfhosted/awesome-selfhosted
He bid 20k over, which is 3% of the asking price of 595k. I agree with the other points, but 20% sounded way off