Got some questions pop up of my mind after answering another thread. (1) How Google determine the API Quota units for each account? Money spending? Usage? Relationship with Google? (2) Will it be increase if you use it often? One of my biggest account that I spend USD$100k per month, only have: Quota units used this month: 0 Quota units remaining: 15,000,000 I have not use API before - just apply for it for fun, but I think when I signup I remember seeing login cost 10,000 units, etc...If what I remember is true, then I cannot see any use of it as the quota will be depleted rather quickly.