The Washington Post has a retrospective on 14 years of Mark Zuckerberg saying sorry, not sorry [washingtonpost.com]:
From the moment the Facebook founder entered the public eye in 2003 for creating a Harvard student hot-or-not rating site, he’s been apologizing. So we collected this abbreviated history of his public mea culpas.
See also Wired's coverage, Why Zuckerberg’s 14-Year Apology Tour Hasn’t Fixed Facebook [wired.com]. It's a formula that works.