Same goes for open-source though in the "no military usage" example, as the OSI says "No Discrimination Against Persons or Groups" and "The license must not restrict anyone from making use of the program in a specific field of endeavor"

In euro office's case, the fsf acknowledges a lot of licenses as free and many allow additional terms (MIT for example). The AGPL just isn't one of them, and if onlyoffice decided that they did want to add rules, they could've chose another free license.