As of March 15 2017, Dropbox will be ceasing support for Public Folders for free users. If you use a Public folder, it'll automatically be turned into a standard, private folder on that date. If you use the Public folder to host your mods, your link will break at that time. Which might suck!
You can create a share link to a file in a private folder and it will still work, so this isn't the end of the world. It does, however, add a few additional, annoying steps to using Dropbox to share your work here. You might also consider alternate file hosting, but keep in mind: you get what you pay for...