Recently we received notice that we would be billed for one of our Editors becoming a Doc Maker. Coda said that they had created a new document. The user, however, did not create a new document. They did add pages within a document. Does that require them to be a Doc Maker?
This is usual behaviour when someone in your team creates a doc. This triggers the upgrade.
Making pages etc is not classed as a doc maker and therefore you wont be charged. If your team want to make their own docs you might want to advise them to do it in their own personal space where they handle their own billing etc.