Why most "free" AI coding tools aren't actually free

I've been researching AI coding tools over the past few weeks, and I kept noticing the same pattern.

A tool gets described as "free," but it usually means one of four things:

You need your own API key.
You get a small free tier before upgrading.
It runs a local model.
The interface is free, but you're still paying for inference.

None of those approaches are wrong—they're just different tradeoffs.

When I started building Clixad, I wanted to answer a different question:

Could an AI coding agent be free without requiring users to bring an API key or pay a monthly subscription?

The idea I'm testing is simple.

Users receive free credits when they join. Once those run out, they can earn more by completing advertiser-funded offers. The advertiser pays for the completed offer, most of that revenue becomes AI credits, and those credits are used to pay for model inference.

The goal isn't to compete with power users who spend all day inside Claude Code or Codex CLI.

It's for developers who occasionally need an AI coding agent but don't want another recurring subscription.

The agent itself focuses on the workflow you'd expect from a modern terminal AI coding agent:

understand an existing codebase
edit files across the project
execute terminal commands
run tests
review changes before applying them

I'm still validating whether the funding model actually solves a real problem or just introduces a different one.

If you've tried Claude Code, Codex CLI, or other AI coding tools, I'd love to hear your thoughts.

At what point does an AI coding tool stop being "free" in your mind?