I am a designer, but I once did a project with a very very major and recognizable tech corporation that, no joke, implemented an 8 character limit on passwords for storage reasons.
This company made in the tune of tens of billions of dollars per year, and they were penny-pinching on literal bytes of data.
I can't say who it is, but their name begins with 'M' and ends in 'cAfee.'
One of my favorite memories of how much Something Awful's sysadmins were absolutely amateur hour back in the early 2000s was the "lappy" to "laptop" debacle. Apparently Lowtax found the term "lappy" so annoying that he ordered his system administrator to do a find/replace for every instance of "lappy," replacing them with "laptop."
Unfortunately this included usernames and passwords, as well as anything that just managed to have the letters "lappy" in that order anywhere in the word. So, there was one user named 'Clappy' who woke up one day to find his name changed to 'Claptop.' Apparently this is also how people discovered that they were storing password unsalted in plain text in a fucking MySQL database, which if you're old enough, you probably already remember that the combination of MySQL and PHPmyAdmin were like Swiss cheese when it comes to site defense. :p
"Well, wants to send me and people like me to a concentration camp, but I do hate gay people sooooooooooooooooooo"