It’s already well established in case law on how companies are allowed to change their EULAs with Douglas v. Talk America being the most directly comparable case to what roku is doing. The problem with case law though is it’s inherently flawed for your avarage consumer as you have to enter a costly legal battle that’s may not even be worth the financial risk and corporations know this.
What we really need is for the regulatory bodies to start enforcing the laws we already have on the books with penalties that are not just a slap on the wrist.