Related Clues:
- Televised plugs
- Spots in a Senate race, say
- Web popups
- Pop-ups, e.g
- They're often negative before elections
- What Mad magazine lacked from 1957 to 2001
- Network revenue generators
- Blockers' targets
- Product placements
- What TV watchers often zap
- They pop up now and then
- They pop up here and there
- PennySaver pitches
- Magazine money makers
- Circular parts