Not sharing you personal information with 3rd parties is not the same as not collecting information they don't need.
Know what data any application collects is very important, not only because of the possibility they could sell it (or share) but also because now your information resides on their computers and who knows (only them) how secure they are and when they are compromised.
Exactly, that's why we don't collect any personal information from our users. The only exception to this is when you opt-in to share your music library and profile data by giving us your Facebook id, which is obviously a different case. (And we are very careful about the security of our servers in any case.)
I'm really sorry that A.Nonymous took my initial response in our forum so negatively. I wrongly assumed that he would understand what I meant by keeping our server in sync with a user's library: it just means that we need to know what songs you have on your device. So when you add and delete songs we notify the server so that it can keep up to date on what you have. As I said in our forum, we use that data to give recommendations, download album art, give artist info, etc.
I asked A.Nonymous not to be so dramatic after he said he was "struck" by my "arrogance", and when he claimed that we "secretly collect information on your users and then refuse to disclose the nature of that information when asked." I really was trying to give him the information he wanted, but I obviously failed in this attempt.
I spend a good part of each day being very precise in my communications with our users, and I sincerely apologize that my initial response to A.Nonymous wasn't sufficiently informative--it clearly wasn't my best work. We take support very seriously, and while you can't please everyone I think the large majority of our users would agree that our support is very good.
The bottom line is that we have hundreds of thousands of active users, we're the top media player in the Android market, we've been plugging away at this for two years now, and we're not about to jeopardize all that by collecting personal information from users without their consent. I don't even know what value that information would have, but I'm pretty sure it would be far less than we currently make from our loyal users.
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Peter Jeffe
MixZing