When a social media (always in the media) site that's well known starts tracking user links and proving that to any third parties - the argument from reddit will be that it's A) Anonymous and B) Secure - both of which are hot topics which are quickly starting starting to be disassembled by the general public - undoubtedly reddit will either be wrapped up in it which could be financially costly or publicisd and will likely turn off users.
Seems like a very odd time to be making a move like this.