We think this is the most sustainable option because there is a cost to providing a quality service. We take a small loss on every user who cancels their free trial - more than a typical SaaS because AI models are expensive to serve.
Personally I only need about 30 minutes with a code autocompletion LLM to see if it will do what I want without pissing me off (and maybe even making me smile!)
I'm never going to try if you ask for my CC up front though. Sorry.