Sometimes people don't need a product immediately and would rather buy it when it gets cheaper.
Together with John Piasetzki, we created a website that monitors the prices of products. Users enter a URL for a product page with any online retailer and the program determines where the price is on the page and then monitors that for a decrease. When there's a decrease in the price the user gets an email.
This service was developed in 24 hours for AngelHack Toronto.
This was a modified version of the TweetDonate engine that was changed to work with PayPal's API documentation.
The campaign maintained a series of large spreadsheets updated by teams of people around the US. The spreadsheets had a variety of different people, offices and coordinators with contact information for each. The campaign wanted to let the public find out who to contact in a way that could be maintained despite rapid changes.