There is something simple that Coda can do to broaden its usage – this is allowing individuals to receive a link and edit the documents without logging in or creating a Coda account. Many external collaborators do not want to create a Coda account or share Google credentials for a one-off engagement or want to collect data from a broader group of people. Google docs already has this featured enabled. It makes sense that Coda follows suit and this should be fairly easy to implement given the advanced sharing abilities already included. If it is not implemented then some end users will assume that Coda is more interested in gathering people’s data than protecting privacy. I hope this helps. Kindly let me know if you have any questions.