After further review, the account verification requirement is by design and working as expected. There are many reasons a Bing Rewards member may be prompted to verify their account, one of which may be due to search behavior and patterns. This is to ensure that searches are performed by an actual person and not a robot or other automated methods.
According to the Bing Rewards Terms of Use (
https://www.bing.com/rewards/Tou), "A Search is the act of an individual user manually entering text for the good faith purpose of obtaining Bing search results for such user's own research purposes and does not include any query entered by a bot, macro, or other automated or fraudulent means of any kind ("Search"). Microsoft in its sole discretion determines what constitutes a Search that qualifies for credits".
If you still feel you are being unfairly prompted for account verification, please reply back with more detailed information on your daily search activities with Bing prior to each notice for account verification. The more information you provide, the better we'll be able to assist.
Thank you for your patience and for being a loyal Bing Rewards member!
Take care and have a great day!
Sincerely,
Sheryl