My free micro-tool got global organic traffic. Here is what the analytics taught me about developers.

I recently launched a simple GitHub Actions Cost Calculator (githubactionscost.online) as a lead magnet. Looking at the data this week gave me a massive reality check on user psychology.

The Data:

• Total Users: 68 | Events: 366
• The US traffic had an average engagement time of 2 seconds.
• A specific segment of users spent 11+ minutes running deep calculations.

The Takeaway:
If you build tools for devs, realize they are highly paranoid and lazy. My tool required a YAML log upload to calculate costs. Even though I clearly stated "100% Private & Local", the 2-second bounce rate proved that devs won't upload files to a random new site.

The fix? I realized you must have a "Load Dummy Data" button so users can see the 'Aha!' moment without risking their data.

Has anyone else here used free calculators as a top-of-funnel strategy? How do you keep the bounce rate low?