Where The Numbers Come From

A few people emailed to ask how I knew how many users Exposure has. The numbers come from Flickr.

When you use Flickr's API, your app is assigned an API key and every request has to include that key. Flickr provides certain stats to developers about the activity that's happening for each key and one of these stats is the number of accounts that have authorised that particular API Key to access their account.

I don't know what the breakdown of free vs. paid versions of Exposure is, since both versions use the same API Key.