Well the reason for asking is because we should all have a few options to be able to not only make the most economically sound decision but also to do one's own research in order to make the best product choice possible. When you buy a car or any other product for that matter, you don't necessarily buy the first product you come across. Also, this is his thread so I don't thinks it's wildly inappropriate to ask him where he got his product within the confines of the thread he started; a thread where he is heralding the success of said product. He claims to have had success with his product and I've also heard a couple of forum guys have success with the sponsor's product so with that in mind, we can all agree that it's probably a good idea to "shop around" not only for price, but also for efficacy.
I am definitely NOT trying to step on the sponsor's toes but as a possible consumer, I should be able to compare products.