The blog post request is to make it clear that his account was linked to an account engaged in fraudulent activity. Apple wanted him to post it because it would make clear that he opened both developer accounts with his credit card, even if he eventually lost control of one.

If you open developer accounts that eventually engage in fraudulent activity you're not "owed" an apology. You should be on top of the things you open in your name and with your bank details.

Apple should have taken steps to notify all linked accounts. That's their mistake. But it was the developer's mistake to open an account for someone who would engage in fraud in the first place.