DIVE summary:

• Twitter's wants to sell a lot of ads to small advertisers, but they also need to get big brands on board in a big way.  All Things D was given Twitter's pitch deck from a big brand advertiser.
• Twitter is still having to go over the basics, and explain what they do.  Illustrations of the different kinds of use-cases (and thus touch-points for brands) are littered throughout.
• If you spend $6 million a year, advertisers receive a 10% discount.  They also promise value adds for big spenders, including something they're calling "joint business plans" as they launch new features.
• The deck also highlights their mobile expertise as it compares to Facebook.

From the article:

Twitter’s ad business is looking less like an experiment and more like a real business, one that could generate $1 billion a year in the not-too-distant future.

If Twitter ads really take off, it will be because CEO Dick Costolo will have figured out how to sell lots of little ads to small marketers, in the same way Google did more than a decade ago. In the meantime, the company seems to be succeeding with the other end of the spectrum: Big marketers interested in experimenting with a brand-new format.