The ISL boosted Campbell's bank balance, helping the former world champion finish the year with total earnings of more than $500,000.

Campbell believed the ISL would help swimmers hit the jackpot in the future.

"I have been doing swimming for many years now but I haven't experienced a competition quite like the ISL before – for an old timer that is quite exciting," the 11-year Australian team veteran said.

"I hope in 30 years' time I will look back and there will be a fully functional professional swimming league and think as part of that, I was right there in its infancy.

"If we can continue to make it [swimming] evolve and move with the times that would be my ultimate dream."

Campbell hoped the competition's success would also help end a "cold war" between the ISL and world body FINA.

FINA initially told swimmers they would be hit with Tokyo Olympic bans if they competed in the "rebel" ISL, but withdrew the threat after an outcry from star athletes, including Campbell.

"This isn't about pitting two organisations against each other," Campbell said.

"I was a fan of the ISL because I saw an opportunity to further the sport of swimming, to make it a more viable sport for athletes to choose.

"Hopefully this cold war that is going on between FINA and ISL will be resolved in the future and I think it will.

"The ISL had to come in and shake up the game and change things and while FINA might react to it, I hope that eventually we can start working together for the benefit of swimming."

Campbell is looking forward to a well-earned break after her busiest year, which also included earning more than $400,000 on the seven-leg World Cup series, a world titles campaign in July and FINA's Champions Series – the world body's answer to the ISL.

"When I started this campaign it wasn't about making money or joining a rebel cause, it was about giving myself the best possible preparation for Tokyo," Campbell said.

AAP