An interesting article about how Jarret (author of the article) came up with the precursor to FSRS (Free Space Repetition Scheduler), the algorithm used by default in Anki now
This was my concern too. The whole point of using S3 as a file system instead of EBS / EFS (for me at least) is to minimize cost and I don't really see why I would use this instead of s3fs.
Yeah, the fact that she realized what's going on and still worked tirelessly to give Mark / Facebook more negotiating power speaks volumes. I also can't buy the whole "I have financial woes and can't escape" spin that she puts on her situation.