Personally, I think it's because Cabela's wants to highlight their own brands, which makes total business sense. It's really an incredibly smart business model to retail all the major brands, and then take features from the best sellers and put your name on it.
Also, there has been an increasing shift in the hunting industry to higher end gear in general. The lower end items aren't moving as well as they used to, and the margins are smaller so the bigger retailers are eliminating them.