Earlier quoted context omitted.
There is at least two cases that this doesnt explain. http://twitter.com/#!/jonathanscard/status/10034195955777536... http://twitter.com/#!/jonathanscard/status/10035604975584460... edit: now at least 5, see above
Jonathan here: I see what you're saying, and of course it is possible that some jerk is buying gift cards with the card. That said, it's worth pointing out that the tweet stream is not real time and it doesn't have every transaction. The card balance is scraped from the sbux site every minute and posted to Twitter if it has changed since the last tweet. When there are multiple transactions in the same minute, the cha…
The balance is really neat to see and it keeps people engaged and thinking about this project, even if they're not actively partaking (like myself, at the moment).
The smaller installments of cash also help others realize that it's okay to submit small amounts and increase the likelihood that more than just one person with a large purchase will benefit.