That 15 minute maximum includes a mandatory waste of 38 seconds of a recorded message telling the receiver that the person on the other end of the line is in federal prison. Additionally you waste approximately 1 minute during the call when a woman's voice reminds you all that the call was placed from federal prison. That's just the time the voice is talking.. it doesn't account for the fact it is seemingly random and derails any train of thought. All in all you waste over 1.5 minutes of the call...
Outside of Unicor you're screwed if you expect to make more than 20 dollars a month.
Oh and the email system ha ha ha haaaa you pay by the MINUTE to email. Imagine how many people can't type well at all? I spent so much time typing up messages for people because they couldn't type well. It's just pretty sad. Huge rip off for every one in a vulnerable position.