Related Clues:
- Billboards, e.g
- Super Bowl Sunday highlights?
- "Make $8,000 in ONE week," e.g
- YouTube video preceders, often
- Movie trailers, e.g
- Billboard fillers
- Random link from some stranger, say
- Like content from the @Horse_ebooks account on Twitter
- Paper revenue source
- Email box clogger
- Commercials, in brief
- Unwelcome messages
- Pitcher's delivery?
- Email, as a million strangers at once
- Email that's likely to be deleted