Yeah, the way this category is growing it could be good. It's just hard to predict how many senior guys will bid onto it. You can get an idea by going into ecrew and looking under "advanced entitlement". There is an option that will tell you how many pilots senior to you have in a bid for a particular category. It's still just a rough idea though as it gives you all the guys even though your category may be their second or third or fourth choice. If they get their first choice, then they're not a factor.

I don't know what "shadow bidder" is. I saw that and wondered the same thing