Many users want more privacy but aren't willing to switch to less powerful search engines entirely.
Build an extension that strips tracking from Google searches, aggregates anonymized results, and offers opt-in personalization without profiling.
Privacy-conscious searchers pay a subscription for ad-free, tracking-free enhanced results. Enterprise version for teams.
Start with basic tracker blocking and search customization, then layer on features.
Risk: Google could block or replicate the functionality.