Bug bounties are the real chilling force here, not the terminology used to describe a disclosure protocol. From what I recall before then there was a full spectrum of behavior, some would let the vendor steer the disclosure, some would set a timeline and stick to it, and some would hang the scalp as soon as they could.

I don't know that I personally ever witnessed any major fallout from the release of a zero day. Seemed like more of a speculative risk than anything. Plenty of shaming to go around though.