Hi there, Shaun! This is Marc. Thanks for reaching out to the community.
Microsoft Rewards may flag “unusual search activity” if its system detects patterns that resemble automated or bot-like behavior, such as completing a large number of searches extremely quickly. This is to prevent abuse and ensure fair participation for all users, but it can sometimes mistakenly affect fast typists or power users.
To reduce the chance of being flagged, try spreading searches out over time instead of completing them all at once. If you believe this was triggered in error, you can reach out to Microsoft Rewards Support here: https://support.microsoft.com/en-us/account-billing/learn-about-microsoft-rewards-c5ab735d-c6d9-4bb9-30ad-d828e954b6a9 for review and assistance in restoring your earning ability.
Let me know how it goes.
Best regards,