The earnings I post represent data pulled from my credit card merchant account as well as Paypal and sites where I sell other items such as Amazon Kindle and Lightning Source (my book printer).
The lessons on web marketing are all designed to help you generate a web based income however your personal income will vary depending upon how much effort you put in, the quality of your product, customer service and your reputation. Sometimes a great idea can do badly for any number of reasons and of course a sucky product can sell like hot cakes. ‘Go figure’ as they say in the USA.