Thanks that is helpful, although even that only says they charge a "fee" for purchasing credits and then links to this page[1], which isn't very straightforward

Thanks that is helpful, although even that only says they charge a "fee" for purchasing credits and then links to this page[1], which isn't very straightforward [1]: https://openrouter.ai/terms#_4_-payment https://openrouter.ai/terms#_4_-payment