For what it’s worth, most guys who’ve been in prison have little to no interest in revisiting their time inside for obvious reasons. There’s of course some (relatively) happy times but they’re largely outweighed by the bad, often traumatic times that many former inmates understandably downplay because they’re used to the "suck it up" attitude.
Also, talking about prison with people who’ve been in prison is one thing but talking about prison to people who have never been in prison often just results in the same tired old questions, many of which come with a very morbid but almost gleeful curiosity. That said, most people who’ve been in prison aren’t too thrilled about talking about it even with other formerly incarcerated people.
Obviously there’s some former inmates who love talking about prison but I think guys like that just want someone to listen to them more than anything. Those are also the types of guys who lie their asses off about their prison experience and were probably known inside as a bullshitter.
There’s other exceptions, like inmates who are outspoken about their experiences specifically to open peoples’ eyes about how the supposedly “correctional” system is nothing but a sick form of traumatic retribution that only increases the rate of recidivism (and likelihood of people becoming victims of crime, I’ll add). So even if a person doesn’t give a fuck about inmates, they kind of should because the crueller and inmate is treated, the more likely he is to offend or re-offend in the future.
Things like AMAs are rare because that requires verification which for a million opsec reasons is a horrible idea.