Free: Contests & Raffles.
I just don't see the advantage. I pre-measure my powder charges before I go hunting, and keep the powder in "quick load" containers in my pocket. I'm not sure how pellets would be any faster for reloading. Loose powder is also a lot less costly and that is probably the main reason I'm not even interested in trying them.
Forget the bear spray, use wasp killer. Concentrated delivery stream, 10X the product, and only $3.00 on sale.