This is already present in EU. Spiegel.de and others are like that. Pay or be tracked.
An alternative might be homomorphic encryption, which would already be doable with current technology for something like a newspaper.
It’s simply that nobody has been sued to the end for it yet.
And legal challenges to that are in the works. Some have even been partially upheld. “Pay or okay” done as a binary choice isn’t okay, like anything else, granular consent is important:
https://gdprhub.eu/index.php?title=DSB_(Austria)_-_2023-0.17...