Hello BHWers, this is what I believe if you do you might have 800 ad accounts because it worked for me. Now, you must first sign up with the Facebook business manager. After that, run some ads maybe into 500$ or more, it could also work with a lesser amount, I had spent about 400$ on my account. Then, use this page to request for the limit on your ad account creation to be lifted. Note that you are sending a message through the page's inbox. https://www.facebook.com/facebookadsupport/ Now, this is where the trick is, when you are sending them the request, don't sound desperate. Make them understand that you handle pages that requires that you place ads separately to enable you to monitor the ads effectively. Don't request for them to increase your ad accounts to 800, rather, just mention that you want the current limit to be lifted. You can be smart and creative in persuading whoever is going to read your request. I believe the lifting is done manually. I wish you the best!