Sponsorbar

SponsorBar puts unused Mac menu-bar space to work by letting advertisers bid for placement there and sharing the revenue with you. It is free to install and use, with no subscription, and earns money passively while you use your Mac normally.

The app does not read your screen, files, apps, browser history, window titles, keystrokes, or screenshots; it only checks whether the ad was visible for a minute and whether you clicked it. You can pause or snooze ads anytime, and payouts are made weekly in 34 countries.