Isn't accepting credit cards for bitcoin just asking to be charge backed to banktruptcy? I think they were just lucky they only got one charge back.
An interesting question. I figured as much until now, but what if you actually have proof of delivery which might well be the case? Will VISA just charge back anyway? How often can you chargeback until you're marked as fraudster and your account closed with VISA/Mastercard?
The person who's card you stole gets marked and you pull up the next card and go again.
It would be convenient if people could use Visa/MC to transition, but they kind of suck at committing to transfer value.