I just saw this comment just now, and one thing you might not be aware of is that, actually, all 'random user' purchases do actually say in the email that it's a random user purchase, and to my knowledge, always have done since it was implemented. Certainly that was true back in October 2009; I have the email to prove it. Specifically, it said:
"Your account has been randomly selected to receive someone's payment through our program that allows users to buy paid time for random free accounts."
(in this case, the sender was anonymous; actually it was me doing a test, but I had used the "anonymous sender" option)
The text might have changed since then, but I know it's still there because when I bought random paid time for somebody recently, they left me a comment to say thanks, and specifically referenced the random element, so it must still be mentioned.
Maybe it's not clear enough, though? Obviously it's a very bad thing if people choose not to use the feature out of fear of how it'll be taken, so I'm certain Mark and Rah would want it to be made clearer if people aren't using it because of that. I'll point them towards your comment and my reply.
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"Your account has been randomly selected to receive someone's payment through our program that allows users to buy paid time for random free accounts."
(in this case, the sender was anonymous; actually it was me doing a test, but I had used the "anonymous sender" option)
The text might have changed since then, but I know it's still there because when I bought random paid time for somebody recently, they left me a comment to say thanks, and specifically referenced the random element, so it must still be mentioned.
Maybe it's not clear enough, though? Obviously it's a very bad thing if people choose not to use the feature out of fear of how it'll be taken, so I'm certain Mark and Rah would want it to be made clearer if people aren't using it because of that. I'll point them towards your comment and my reply.