And they can make a "massive impact" on income and bring about boardroom change at Ibrox by doing so.
That was the prediction from one prominent Gers supporter today in the wake of King's explosive public statement yesterday.
It was claimed that he had an offer to loan the stricken SPFL League One club £1million - interest free - turned down. Fans were furious when it emerged that shareholders Laxey Partners stood to make a £150,000 profit on a £1m loan secured on Edmiston House and the Albion car park.
King's comment was dismissed by Rangers chairman David Somers who stated that only shareholder Sandy Easdale had offered an interest free loan.
Greenock businessman Easdale, who is a member of the football board at Rangers, is putting up £500,000 in "working capital" that will be repaid in September.
But South Africa-based businessman King, who once ploughed £20m of his cash into Rangers, has also called for fans to "pool" their season ticket money.
He has urged his fellow supporters to use their season ticket money next season to demand a far greater say in the running of the Govan club.
He believes that releasing funds to the club from the trust on a "pay-as-they-play" basis will give them a greater say in their business affairs in the future. And the Castlemilk-born multi-millionaire has also urged fans to demand a representative on the club board who can look after their interests more closely.
The three main supporters' associations, the Assembly, the Association and the Trust, have spoken in the past of "disengaging" with the club.
But that prospect was not well received by many fans who want to help Gers return to the top flight.
But Rangers Supporters' Trust board member Gordon Stewart believes that a sizeable number of supporters would be prepared to take King's advice and pool season ticket money.
He said: "I don't necessarily think that all of the supporters will take this course of action, but there's definitely a segment of our support who will take it.
"There is a huge feeling of dissatisfaction among a fairly large number of our supporters at the moment and I think they could make a massive impact on the income of the club."
Lifelong supporter King also stated that he hoped to be part of a fan-based initiative to acquire an influential shareholding in the club.
A statement on the official Rangers website last night read: "The board notes Mr King's comments with concern as they are potentially de-stabilising and damaging to Rangers."
Meanwhile, Gers' home fixture against Forfar on March 26 has been moved to Tuesday, April 15 at 7.45pm.