You had said:
But now you're assuming they would've had some other choice. If the original OGL had included royalty terms, and upon the release of 4e Paizo faced a choice of the GSL (to continue publishing official D&D content) or the royalty-encumbered OGL, they might very well have forged ahead with a 3.x-based Pathfinder anyway, royalties or no (depending on royalty terms, anticipated profit margins, etc.). Retrospectively arguing that royalty requirements would've prevented the appearance of Pathfinder (or the OSR) is speculation, and the inclusion of royalty terms in OGL 1.1 doesn't necessarily preclude its use in generating future business ventures.
Of course, OGL 1.0 still exists, and is royalty-free, providing another option.