Add .dropboxignore directory to exclude folders without using selective sync

It's there in a simple right click context menu. It works on both platforms. it's scriptable. Given it can be triggered, that means something can also trigger it (a trigger trigger) and this is how your ignore files could work but how thats better than the right click or double click a shortcut I don't know. 

If your work is project based, and you don';t want it to upload/sync until your done and out of the project, this works really well. two ways I've done it are
1 - right click the project folder and 'don't sync to dropbox', do your work save exit and then right click on the project folder and choose 'sync to dropbox'.

2 - use the code for Mac and PC I posted earlier and save a powershell/Mac script and you can set a global trigger to run that code, on the parent folder, of any project opened by app x. This is what I do at the moment, I only had to set up the code once, nothing has to be pasted around the place etc, I just carry on working as if nothing is any different and it works great.