Lizard said:
This hasn't been shown.
It's been implied -- but never explicitly stated -- that some people at WOTC/Hasbro think it is. Since they haven't said this, they also haven't offered any kind of proof of the thing they haven't said. So what we have is people on the internet with no knowledge of sales numbers saying what they fervently wish to be true, and people on the inside -- Dancy, Cook, etc -- saying the opposite.
I know who I'm more inclined to believe.
I agree and disagree with you somewhat.
I tend to think the OGL was initially good for WOTC when everyone was producing products that required having the PHB. A paizo adventure will require the use of the DMG/PHB as does a campaign setting or a monster book and this is what I always remember Dancey talking about when he said, "The OGL will be GREAT for WOTC".
I'm not so sure about those products that were entire games in of themselves. On the one hand, there's the belief that since they were similar to D&D in terms of mechanics, players would be more willing to come back to D&D so to speak. I imagine there ARE players that try new games based on a familiar mechanic but I don't think those gamers are anything like the majority. It assumes that after playing Spycraft for a while, you'll naturally drift back to playing D&D.
This, I don't think follows quite as closely as for example, I know many a Vampire player that wouldn't even touch the Werewolf games even though they use the same system and are situated int he same world.
What would be true is that those books do benefit from certain cost reductions (no need to come up with your own mechanics) AND the added benefit of being able to use the d20 sticker to highlight their product.
Here's the thing, WOTC (and by extension, Hasbro) are all about the money. If it makes them money, they do it. We're not taking about someone like Kevin Siembada who has a personal stake and thus will forego potential profits because he doesn't like it.
I think WOTC wants a certain types of product being produced and not anything that can potentially drain customers.
Now, I hope that this could be considered a reasonable interpretation and not fear-mongering or cheerleading.