But simple zip on raw text is what? 3 or 4 to 1? Particularly when you're talking about urls. So now you're talking about at least a couple kbytes of raw data.

But simple zip on raw text is what? 3 or 4 to 1? Particularly when you're talking about urls. So now you're talking about at least a couple kbytes of raw data. So logging all of everyone's texts is probably still out. But easily logging their browsing patterns. Probably app installation and use. And certainly they retain the capability to log texts containing keywords without going too far outside that aggregate range of data. Or doing targeted logging of all of selected individuals usage.