I like the overall idea and presentation. In trying it out, I hit the token cap before my trial task was able to complete and show me the end result. I'm sure your free-tier token costs are non-trivial but it was definitely a bummer that I couldn't even see one initial run's output to decide if I wanted to pay.

I decided to gamble the one month fee to let it continue, but the payment defaulting to annual was jarring. I can see it lets you advertise a lower price but that only made me more tempted to leave altogether when I saw the price go up on the final screen.