I have to think it's just the money Bauer has, but so many goalies are not big on change. Or maybe just old school ones? Vasy started with Brian's and then went to Bauer, so that's why I have to think if they get to a newer goalie or someone who isn't elite, they can convince them with money.
I know Lefevre has been Reebok, CCM, and now True, and quite a few goalies will stick with them regardless of the branding on them.
Since I've played goalie I started with Warrior pads, had Vaughn's for a short period of time but they didn't fit as well, and now back to Warrior and love them. I wish they'd go to the NHL..
If I had a bigger budget I'd look into a full custom Brian's set, or maybe even try Vaughn's again. I just feel like those two have credibility based on being goalie specific.