Removing the download option from a URL?

Is it possible to remove the option to download a PDF when you have sent someone to a URL link? It always gives the option to download it to their computer. If I am running a membership site and do not want them to be able to just download everything and save it in their first month, how can I remove the option?

Thanks everyone!

[Moved out of the forum Lounge (which is not for support and is not specific to Acrobat, Document Cloud, Creative Cloud, or anything really) and into what I hope is a more relevant forum - moderator]