I use Base Camp often and e-mail and post links to GPX files all the time for sharing. I do not know what this drop box thing is and have not been able to open or save anything in those links.
i have always shared my files to whomever needs it without requiring an account. use it all the time for my business when i need to share big files. you have the option to make it public if you desire.
Yes that opened and I see your message. But when you click on one of the routes above it has some choices to make, one of which is open an account. None of the other choices work for me to get a file open, downloaded to save or view. I do not want to sign up for a drop box account.