You start with access for one user only, but in development state you can request access for up to 500 users, which should cover most of the use cases for Fastlane integration.

Even Dropbox themselves encourage staying in development state when the app is used as an internal tool. Try Dropbox Copy Plugin, and move it fast I’m a professional Web Editor who needs to test and review software, as well as offer suggestions and tips for others. GoAnywheres Dropbox integration supports secure cloud file transfers between Dropbox and an organizations private network. Whats more, Dropbox integration comes in the same Addon with Google Drive, Microsoft.

You also don't need to apply for production state of your app, and keep it in development phase unless you make heavy use of it. The Dropbox connection offers duplex synchronization for all your files.

You'll also have to come up with some name for the app, but this is not used by Fastlane in any way.

For Fastlane you only need the access token (or the app key and app secret).

In order to register a Dropbox app you need to go to Dropbox Developers site and create your own app. The Copy plugin for Dropbox allows you to quickly move files and folders to the public folder of your Dropbox account from Windows right click context menu.

Note: Dropbox allows accessing their API only for authorized applications, so in order to use this plugin you must register a Dropbox app.

This plugin allows for uploading files to Dropbox from Fastlane, using provided Dropbox client application.

What is a dropbox plugin