It wouldn't cost $10 for their lifetime use if they used cheap models instead. Mistral Small 3 24B is probably substantially better than their Qwen 3 0.6B trained model and would give you about 500,000–2,000,000 English to Bash translations. If they're a heavy user, they might use $0.30 in total, ever.

They also used Astra for the coding, which they can't get on a $10 subscription. And then there's the actual training cost.