Ask HN: Ufuwbcquasdwyyctawdw

Miles & More, Lufthansa's frequent flyer program, will often render the text "ufuwbcquasdwyyctawdw" in various places on their site and in different markup. Does anybody know why they might be doing that?

https://www.google.com/search?q=ufuwbcquasdwyyctawdw