I sent the same link to three Slack channels last Tuesday and realized I had zero way of knowing which one drove the 47 signups I saw that morning. Honestly, it was a bit of a panic - I had no idea if it was the #general channel, the #dev channel, or the #random channel that was responsible for the surge. Look, I know I should've been using some kind of tracking link, but I just didn't think it was that important at the time. The Trouble with Manual Tracking I was using a simple curl command to send out my links, and I thought that was enough. But as it turns out, it's not that easy to track clicks and conversions when you're just blasting out links to different channels. I tried using some Python scripts to parse the referrer headers, but it was a mess - and I'm not even going to get into the whole "users can disable referrer headers" thing. I mean, I've seen some developers use JavaScript to track clicks, but that's not foolproof either - what about users with JavaScript disabled?…