What setting is best to ensure the most ads served?

Briefly describe your issue: Just curious if its better to have it set to my region, which is supported, or Disabled. My thinking is that if its Disabled, that opens up a larger pool of ads to pull from, making it more likely to serve me more ads per hour than from a smaller, regional pool. Does this track?

Are you in a supported region? (see here for list of supported regions) Yes