I believe they're just working on fraud prevention. No need to sound the alarm. I bought bitcoins and my transactions were deemed high risk and cancelled after they received the money and held onto it for some time. Price actually went down from when I bought.
However, their customer service could definitely be improved. It's been over 9 days since I sent a request with no response and my transactions keep getting denied.
I've been memorizing parts of Ruby with this method while reading "The Well Grounded Rubyist." You can import all my Ruby flashcards into Anki. Hope they help. Please email me if they do (email is in profile).
It's from CMU's course titled "Concepts of Math" The professor, Brendan Sullivan, just wrote the textbook in an easy to understand style.Here's a link to the course: https://colormygraph.ddt.cs.cmu.edu/21127-f12/ and if you click the AnnotateMyPDF website, you can get a copy of the textbook, practice problems, etc for a more in depth understanding.