Starting August 1, we’re introducing a significant change to the AdWords API quota system. The new quota structure will value operation types differently. While some operations will still consume just one quota unit, other operations will consume more - up to 1,000 quota units per operation. For example, generating a report for your whole account will now consume more quota units than downloading stats for a single keyword. As part of this overhaul, we will increase API users’ quota by 10 times. For the majority of API users, we believe this improved quota structure will result in more free API usage. Specifically, we hope this will satisfy the requests we've heard through the Developer Forum for more stats operations. For details, please see the Quota & Usage page.
-- Patrick Chanezon, Adwords API evangelist
