When using cost–per–acquisition (CPA) bidding, an advertiser bids using a maximum CPA and pays by:
When using cost–per–acquisition (CPA) bidding, an advertiser bids using a maximum CPA and pays by
Question is about MAXIMUM CPA, which is a dead feature and was replaced long time ago. We are using Target CPA not maximum CPA now. Really difficult to find a reason why Google keeps this questions actual. As its Max CPA.
Target CPA is an automated bid strategy that sets bids to help get as many conversions as possible at the target cost-per-acquisition (CPA) you set. Target CPA is available as either a standard strategy or as a portfolio strategy
Read more here: https://support.google.com/adwords/answer/6268632?hl=en&rd=1