I'd love to understand this too. Some services have prices over the courtesy limit (Translation) while others just have a max. What happens for like the Books

I'd love to understand this too. Some services have prices over the courtesy limit (Translation) while others just have a max. What happens for like the Books API when you get above 10k/req/day? See https://code.google.com/apis/console https://code.google.com/apis/console