Yes, Twitter users account for the amount of sales that Twitter earns. Just as with any business, it takes a flow of traffic to stay alive and open. If Twitter didn't have users they would not make any money from advertisers. The more users they have the more money they can generate from different advertisers.
Yes, absolutely. I think that Twitter users account for the amount of sales that Twitter earns. Without the users, Twitter would be nothing. If people did not use Twitter, nobody would ever have heard of the social networking site and it would pretty much be nothing. Twitter owes everything to it's users.
Without a doubt, Twitter users drive the revenue that the actual company earns. Twitter would earn nothing if it were not for its users interacting on the site. Advertisers are drawn to Twitter because over 100 million people use the site for tweets and the dissemination of information these days.
Twitter users account for the number of sales that Twitter has in the same way that users of any other free Internet service or website do. They're the captive audience toward which advertisers pay to reach. Without them, and without the massive popularity of Twitter, there would be no money to make.
Most people who have invested in Twitter are betting on its technology, not necessarily the value of content published on the site. In fact, it has not been shown that Twitter is able to turn a profit. This website remains one of the most risky enterprises in Silicon Valley today.