Plenty of companies made money on Windows without directly paying Microsoft. Google gets some revenue from Android OEMs licensing the rights to distribute Gapps

Plenty of companies made money on Windows without directly paying Microsoft. Google gets some revenue from Android OEMs licensing the rights to distribute Gapps. If Facebook moves Android phone sales, Google makes money. Not nearly as much as MS did per unit, but Android is also installed on way more devices today than Windows ever could have hoped to be.