When I share a link to a folder the person on the other end gets a full-screen Dropbox Sign-Up Popup.
There should be no obstacles to share my files with someone else. This is also a confusing user experience. The person on the other end thinks they have to sign up to access the files. Or I have to explain to them they can bypass it.
What I'm suggesting is abolustely no upsell pop-ups or obstacles to share files with others. The link should go directly to the contents of the folder/file.
This is what it looks like on mobile when I share a folder with someone (I have a paid Dropbox account). Ugh.