> Google can have the advertising dollars since they are the 80 ton gorilla, but I can't see how anyone can trust them with anything critical to the running of your business.

Well that's my point - you might end up in a situation where you cannot use them for advertising and where you won't have many viable alternatives.

And it seems like Google will just get away with automation like that, either due to manual support just not being possible at that scale, or for other reasoning of theirs, without mechanisms in place for you to bypass the automation and actually get a solution for your problem, unless you operate at a certain scale.

Edit: closest alternatives that I found:

  - Microsoft Advertising: https://about.ads.microsoft.com/en-us/get-started/sign-up-with-microsoft-advertising
  - Amazon Ads: https://advertising.amazon.com/
  - Facebook Ads: https://www.facebook.com/business/ads
  - LinkedIn Ads: https://business.linkedin.com/marketing-solutions/ads
  - Instagram Ads: https://business.instagram.com/advertising

Though I'm curious about their respective market shares, say conversions per year as a percentage of all others put together.