Related Clues:
- Circular units
- Browser history contents
- Pitcher's deliveries
- Autoplaying annoyances, sometimes
- Air breaks?
- Webpage money makers
- YouTube revenue sources
- Many get snacks during them
- Revenue alternative to subscriptions
- You can block them online
- App annoyances
- Some have jingles
- Service announcements
- Break stuff?
- Circular components?