I think we very much disagree, xechnao.
I don't think so. There wasn't a flood of viable (successful) laternate new startups 8 years ago. The OGL and d20 STL pompted a flood of them, the better of whom are still around (with a couple of notable exceptions).
I believe it would. I can think of, offhand, dozens of companies that would not exist without the OGL. Extanding that, form my own work, I can think of several freelancers who have careers in the industry because of my actions. I am not vain enough to think I'm unique in that, so I multiply that by all those companies out there - Mongoose, Goodman, Green Ronin, Necro and dozens more have all jumpstarted careers, some in major ways.
Where did Mike Mearls come from?
But we can disagree.
plus you have to look at where the industry was back then. MTG damn near wiped out TSR, along with TSR's own bad business decisions. If WOTC didn't take TSR over, there would not have been anything as a standard bearer for the RPG industry during those times. I think the only things that pulled D&D through that time and allowed the game to remain alive were a combination of the name brand, D&D, as well as the OGL. It revitalized the industry. Without the vanity-appeasing aspect of the OGL, letting people be their own publihsers, I don't think 3.x or 4e would have had anyting near the fan-base it does today, nor would there besuch a level of developed talent out there.