Imagine this: thousands of the discussion rooms on the social platform Reddit, just like rooms in a gigantic virtual house, have decided to switch off their lights and close their doors. They’re planning to stay this way for a full 48 hours, to protest against a new move by Reddit to start charging third-party applications for something called API access.

If you sell products online, and if you have a mailing list, you may find that you want to add products to your Paypal account for your mailing list API (such as the Aweber API) to use. For example, when you hook the Aweber API into Paypal, you can choose which mailing list the buyer of a given product gets signed up for by which product they have purchased.