You're overthinking it. Gravano's testimony put dozens of guys away, not just Gotti. The government used that slimeball for ten years, right up until he got himself locked up again. That none of the convictions were overturned after the Ecstasy thing boggles the mind.

And you look at poor Frankie LoCascio. The poor bastard is rotting in jail for the past 25 years for sitting on the wrong couch while Gotti rambled on and on just to hear himself talk. They convicted him for saying the occasional "yeah" and "okay" just to appease his egomaniacal boss.