Re:Ask HN: Which is the least invasive way of tracking usage...
by dylz on Sunday November 17, 2019 @02:30PM
(#21559545)
You don't need to collect everything; can just use unique landing pages, log a hit, and for signup include a specific campaign key (like "hn-spam-upvoted-190530") in the <form> and you more or less get a funnel without massive dragnets.
Apart from that, not much else. We do not have an advertising model so we don't need intimate details of our users and visitors.