Ask Why might a publisher earn less after adding more ad networks to header bidding?

[Dean101]

While more bidders may seem like more competition, not every network brings unique demand. Some networks bid on the same inventory, creating overlap rather than higher prices. Extra partners can also slow page load times, causing users to leave before ads fully render. If latency increases, valuable bids may arrive too late and get excluded from the auction. Managing too many networks can also make optimization harder, leading to inefficient bidding setups and lower overall yield. Monitoring bid rates, auction performance, and page speed helps identify whether each partner truly adds value.