If I’m running two campaigns targeting the same audience, could I end up bidding against myself? No. BookBub’s auction ensures that advertisers do not bid against themselves. Updated on March 10, 2019 Was this article helpful? Yes No Related Articles Apple Mail privacy protection and BookBub Ads Viewing stats for individual author targets BookBub Ads Targeting Promoting Chirp Audiobooks with BookBub Ads Does BookBub limit the number of times an ad is shown to a specific reader? Long emails can be truncated by some email service providers. How does this affect Featured Deals or Ads?