Belle Gibson does nothing without weighing up the margins.

So if she is dirt broke, as she claims to be, money talks. And 60 Minutes has done nothing to hose down speculation it paid her a five-figure sum to take a grilling from Tara Brown on Sunday night.

But don't be fooled into thinking this means Gibson is about to tell-all. If recent history is anything to go by she's more likely to continue spinning her web, evading questions and blaming others. A heartfelt apology is out of the question.

In Channel Nine's promo for the interview, the cancer faker says she is "not trying to get away with anything" and that she has been "really transparent". Those who know her have little doubt both statements are insincere.

The Whole Pantry founder's declaration that "I have lost everything" is also a far cry from the truth to the cancer sufferers and fans she callously deceived for her own personal gain. Gibson's reputation may be in tatters, but she has not lost anything she was entitled to in the first place.

She is 23 years old, she is healthy, and astonishingly, she has not been held to account.

Victoria Police is not investigating despite her admission that she kept money solicited from her loyal following of 200,000 fans in the name of charity. And Consumer Affairs Victoria's slow-moving investigation into her fundraising appeals and deceptive conduct is ongoing.

It is unknown whether Penguin Publishing and tech giant Apple - both who saw dollar signs in Gibson's against-all-odds survival story but didn't bother to check whether it was actually true - will take legal action against her.

For the mastermind of a global con who gave false hope to the terminally ill and misappropriated thousands of fundraising dollars, that's not such a bad result.

Gibson launched her business off her fake story of cancer survival after dumping conventional medicine and healing herself with a healthy diet. The disgraced app developer and author said she gave nutrition advice to countless others to help them treat serious illness without conventional medicine.

Cancer Council Victoria chief executive Todd Harper condemned people who peddle false information about cancer treatment, saying it should be illegal to make claims about life-prolonging cancer treatment without evidence.

Cancer survivors who followed Gibson's healthy eating regime - some who credit her for being the catalyst for stopping or never starting conventional treatment - say betrayal doesn't come close to describing how they feel.

Revelations in March that Gibson failed to pass on money promised to five charities instigated her downfall. But in the weeks before the story about the fundraising scam was printed, Fairfax Media was told by people in her inner circle that they did not believe she was ever sick.

Not one of those people were prepared to speak out publicly because they feared Gibson's reach. They said they were afraid of lies being spread about them and their businesses. "She will destroy me," one said at the time. "You don't know what she's capable of."

Others who spoke to media outlets as it all began to unravel claim they received threatening text messages from the Gibson camp.

In the weeks that followed dozens of people who knew her came forward: friends, business associates, former boyfriends, schoolmates and colleagues. They all described a person who despite her young age is skilled in the art of manipulation.

Gibson's drama teacher during her high school years in Brisbane's eastern suburbs recalled a talented actress who was "quite good, actually." Melbourne friends questioned the mental health of a person who faked a violent seizure in front of her son at his fourth birthday party.

As her empire crumbled and as Gibson scrubbed her social media lies from the internet, she was offered what would have seemed like a life raft in the middle of a storm. Bespoke Approach, a well-connected political lobbyist and PR firm, swooped in to provide pro bono services, arranging an interview in its offices with the Australian's Women's Weekly.

Bespoke Approach is an influential firm. It was founded by conservative political lobbyist Ian Smith. Rupert Murdoch's former spokesman, Andrew Butcher, is a partner and former foreign minister Alexander Downer also has a stake in the business.

The firm had hoped for a puff piece about Gibson's life, but the story in which she admitted lying about having terminal cancer turned out to be the final nail in her coffin. Bespoke Approach, whose client list includes some preeminent cancer facilities in Australia, confirmed on Thursday it no longer acted for Gibson.

Questions to Gibson about the reported payment for the 60 Minutes interview were not answered. A spokeswoman for the Nine Network said: "We do not comment in regards to payment of interviewees on any of our programs."

Viewers on Sunday night should expect a calculating Gibson: a woman likely to spout a series of meandering excuses, possibly about her childhood, no doubt about the natural health practitioners she claims led her astray.

Hopefully she is reminded of the since-deleted social media posts and the section of her book that refers to her "conventional" cancer diagnosis, and the radiotherapy and chemotherapy treatment she claimed to have received in hospital.

Given 60 Minutes has been circling since the story broke in March there may also be some new information about the depths of her betrayal.

If Gibson truly is seeking redemption, any money paid for this interview would be donated to cancer research and the charities she stole from.