Using Adwords to Earn Uber Referral Credit
alexshipillo.com
alexshipillo.com
I don't know if they could see my e-mail address as well, but it was extremely uncomfortable from a privacy perspective, so I ended up asking Dropbox if they would cancel my referrals.
Not that I don't want the storage, but it makes me uncomfortable that people I don't know might have my e-mail address, especially if I post the links in a context I believe to be anonymous or pseudonymous.
It's really none of my business who they are and would be an invasion of their privacy for me to know - in my opinion.
I guess an argument could be made for refer-a-friend programs working differently, but the default should always be sharing this kind of data only on a need-to-know basis.
We can argue back on forth on what the implications of the names showing up are and aren't[1], but neither the referrers nor the referrals knew that this would happen. That's bad privacy on Uber's and Dropbox's part.
[1]: Not everyone manages to get people to sign up as fast as you did. The implication of this is that if I know who signs up and when, I can surmise their name based on this information, which violates the user's privacy. Again, privacy is very contingent on the implications of what a malefactor might be capable of.
Whether a mountain or a molehill, this is something that just doesn't serve any good purpose but comes with some negative consequences.