I'm building an tool that combines OCR and text categorization of an image. Each job accrues cost with compute time. The rest of the tool is negligible cost.<p>The outcome is not discrete, so I worry about charging a usage based fee. If the output is not perfect (9/10 times), I wouldn't ask a user to pay for that job. A subscription model is an option, but a user could easily outpace the monthly cost if processing many jobs in a month.<p>What are some useful monetization strategies you've seen for AI tools to overcome this challenge?