As I said the "by using this" nonsense does not work here.
Another company got fined for offering a broadband test option on their website and collecting data without revealing the true purpose and intentions. The users of the website used it to determine their speed, they provided their phone number solely for the purpose of obtaining that test.
The company then cold called them using the number they used to confirm the telephone exchange to determine what levels of broadband were available.
The regulator fined them a lot and the company responded by adding a note in small print and in the terms that the company may use the phone number to sell them services and that too was disallowed.
You see people determine the purpose of the provision of their data, that is one of the core principles of GDPR and the same will apply to Roku. Customers are choosing programs with a purpose to watch TV, they do not want their privacy invaded and shared in this way.
In my opinion it will be impossible for Roku to ever get this to be legal because the product is sold by 3rd parties and can't be returned to those 3rd parties under consumer law because they don't agree with the onerous privacy policy or terms of use applied by Roku.
So unless Roku starts providing all their devices direct to customers and prominently makes these key terms visible and offers the option to decline then they will always be in the wrong in EU and UK.
You simply cant presume consent if no option is provided to decline but retain the rights afforded to them of their purchase. i.e. that a product must
1. Be as described
2, Be fit for purpose
3. Last a reasonable period of time
4. Be of reasonable quality.
This applies to services too, but goes further in that they must be provided with reasonable care and skill
The legislation also says that the consumer should not be inconvenienced.
Reasonable is defined by what any reasonable consumer might expect or what has been promised.
For example I contacted the manufacturer of my Fridge Fridge freezer and asked them what was the expected life of the product, they told me they provide an 8 year warranty and free labour after that.
This gave me a reasonable expectation of at least a 10 year life and not only is the retailer liable but also the credit card company if I bought it on credit.
I am definitely going to make some calls to the regulator about this breach of GDPR.