[keonix]

You could sell tokens that get used up after each search or expire after certain amount of time since first use. Browser extension could store tokens and provide them to website as needed in random order. Tokens could be resold so no tracking by payment processor

[freediver]

To buy a token you still need payment details. How would this be different to just buying a subscription?

[keonix]

If you buy from reseller they have no way to correlate payment details to search queries. With subscription, however, service provider have your payment details and knows everything about your queries so it can build a profile on you.