It has been revealed that Gary John Devine, the man jailed for prostituting a 12-year-old Tasmanian girl to more than 100 men, has been allowed out of jail on day release for the past two years, and is now out for good.

Devine sparked community outrage in 2009 when he made thousands of dollars by prostituting a 12-year-old Hobart girl.

The Parole Board said the outrage was justified but despite acknowledging Devine has never been able to "remain offence-free for any sustained period of time", granted him parole and did not make him serve out his 10-year sentence.

Devine, now 59, was convicted in 2010 of prostituting the girl at a city hotel and his own home in Chapel St, Glenorchy, and sharing the proceeds with the girl's mother.

When sentencing him to 10 years' jail, Justice Peter Evans said Devine's actions had resulted in a lifetime of disease and physical and mental suffering for the girl.

"The stark and straightforward reality is that the defendant caused a child of 12 years of age to be subjected to sexual intercourse with in excess of 100 men," he said at the time.

Devine had advertised the girl in The Mercury newspaper as "18 years old and new in town", knowing she was in fact only 12.

Over a four-week period from August 2009, the girl had sexual intercourse with more than 100 clients.

Only one of those men — former Tasmanian MP Terry Martin — was prosecuted. He was given a 10-month wholly suspended jail sentence in 2011.

The court heard Devine took the bookings, recording them in a diary and was always at the unit when the girl was with the men.

Devine charged them $100 for 30 minutes and an extra $50 if the customer did not wear a condom and is estimated to have made thousands of dollars from the dealings.

Although he was sentenced to 10 years' jail, he was eligible for parole after eight years.

'Devine's record indicates he won't remain offence-free'

Despite the shocking nature of his crimes, Tasmania's Parole Board decided he had earned that early release.

"The offending attracted, and rightly so, considerable community condemnation," the board noted.

The girl, now in her 20s, did not provide the board with a fresh statement of how Devine's crimes had affected her; instead, the board used an earlier statement she gave at sentencing.

"It is clear from that statement that the crimes committed by the applicant had a devastating impact on her," the board said.

"It caused her estrangement from key members of her family and adversely affected her social relationships.

"She has experienced what appear to be trauma-related symptoms as a consequence of the offending."

The Parole Board found Devine had been of good behaviour while inside, holding positions of trust within the prison and had been complying with the terms of his "re-integration leave" over the past two years.

But it noted his reintegrating into the community would be "challenging" and that Devine's record of prior convictions "demonstrates an inability to remain offence-free for any sustained period of time".

Devine will not be able to consume alcohol or illicit drugs, or enter a licensed premises during the two years he is on probation.

He made threats to harm the girl in taped phone calls while on remand before his eventual sentencing.

In a bid to stop Devine coming into contact with his victim, he will be subject to a curfew and will not be allowed to associate with his co-offender — the girl's mother, who was released in September last year after serving seven years of a 10-year sentence.