The scammers were in full belief that Kitboga's cryptocurrency transfer service was legitimate. The scammers had a second victim who was unable to transfer her cryptocurrency to the scammers. The scammers instructed the victim to contact both Kraken as well as Kitboga's service to help complete her bitcoin transfer.
The remaining mystery for me is how the second victim was able to repeat Kitboga's email address to Kraken support. It's possible that the fake transfer site included this email address somewhere on the page.
To this list I would add "Web Browser Engineering" [0] which is a textbook / browser engine that is currently being written by Dr. Pavel Panchekha at the University of Utah. The code for the book and browser is available on GitHub [1] and a more current bleeding edge draft is also published [2].
The book guides the reader in implementing a graphical web browser, starting with HTTP and HTML then moving on to the layout, the box model, CSS, browser chrome, forms, and scripts.
The remaining mystery for me is how the second victim was able to repeat Kitboga's email address to Kraken support. It's possible that the fake transfer site included this email address somewhere on the page.