You've got it backwards I think, google should offer you a search filter to include paywalled sites while they are by default excluded.

The vast majority of the time, someone searching something on the internet isn't willing to pay to see it.

I've wondered recently if this simple (but powerful) feature would be enough of a differentiator for a search engine challenger to gain serious market share.

Imagine if Duck Duck Go offered that by default?

There are several such differentiators:

- exclude walled gardens

- exclude sites with ads and/or ecommerce

- exclude sites with tracking

- exclude sites with fixed headers

- allow users to have personal blocklists

As a bonus, if you make a new search engine offering such options, existing search engines will be afraid to copy them.