The income during 2012 floated around 400-500 USD for most of the year. In total, Siforia earned 5 263 USD before tax. The revenue came from seven sources, as can be seen in the graph below.
The biggest surprise was the ad revenue from the YouTube channel, which grew significantly over the year from $60 to $200 per month. It picked up the slack left behind from slightly lower book sales during the second half of 2012.
To compare, here is the passive income stream distribution for 2011, for a total of 1 703 USD. Back then the Epub and YouTube revenue stream had just barely started.
That’s all for now. In 2013 I hope to add Hardcover, Audiobook and DVD sales to these graphs. And maybe some Merchandise sales too.