Interesting, the first thing I ever knew about smugmug was their purchase/data save of Picturelife[1], and the story on the Reply-All podcast[2] about the problems Picurelife users were having (err, before the purchase, not after. The discussion of how things went bad for Picturelife is worth the listen).

[1]https://news.smugmug.com/smugmug-rescues-nearly-200-million-...

[2] https://www.gimletmedia.com/reply-all/71-the-picture-taker