Absolutely. I worked for one office where one founder would literally come around doing “bed checks” multiple times a day. I’m talking about a guy with a net worth well over $100 million, seriously connected to federal politics, major local influence on universities and government. This guy spent no less than 15 hours/week checking to see who was sitting in their seats. That was one of his top priorities.
Of course, this bled down to supervisors that he promoted. And as a result, the entire office was full of the most mediocre workers I’ve ever dealt with. Just sit at their desk doing nothing except ready to schmooze the boss. Many were afraid to use the bathroom, go to lunch, etc. Total nonsense.
Can confirm it works now (not sure when change happened; pretty sure I’ve been using since early 2022). I regularly use epub on kindle.
They did recently drop mobi (or at least threaten to - they send me an email saying they are going to drop mobi capability after I send one to my kindle).
Kindle supported file types: • .EPUB • .PDF • .RTF • .DOC, .DOCX • .HTML, .HTM • .JPG, .JPEG, .GIF, .PNG, .BMP
https://www.amazon.com/sendtokindle/email