Melbourne entrepreneur Eyal Chameides traces the roots of his mobile gaming empire back to a simple theory: if he could build a game of solitaire that outshone the thousands of versions that already existed, then he could find enough users to attract a rush of advertising dollars.

Chameides and his two co-founders not only proved the theory, they smashed it out of the park. Their business, Tripledot Studios, which started up in 2017, is already worth about $US2 billion ($3.1 billion)