I’d be very happy to see an option where a publicly shared paper cannot be downloaded but only viewed in a viewer.
Currently, shared folders allow downloading of all attached files as original PDFs.
Google Drive has a lovely option where even if a PDF file is made public, it can be set to “view only”, whereby it will only display in the Google Drive viewer without the download option.
I wonder whether Paperfile would be able to introduce such an option. I think it could even be enabled by default.
Also, if such option is introduced, it would be good to be able to set permissions both globally and individually.
That’s how I use my collection. I have a library of 3000+ papers on a specific topics and want to share it (through a password-protected page on my Wordpress installation) with selected people whom often I don’t know personally (they are people affected by a specific medical condition, or sometimes researchers without full access to medical literature). I don’t really want them to download and then distribute the papers outside my control, esp. that papers often have the downloader’s/subscriber’s name (i.e., mine) stamped on the pdf by the publisher.
I can imagine other similar uses - a need to share the text while preventing further sharing.