I honestly had no idea Hasbro owned the fan club, this explains the changes in the Jawa Trader. They're just dumping backstock on us!
As fo the different assortments you listed, Obi-Dan Kenobi, if a retailer felt that an assortment of purely army builders wouln't sell then they wouldn't order it and then your chances of finding some would be zilch.
Hasbro would love to make every figure on our wish lists, they have no reason not to make a figure they're sure will sell. It's the retailer middlemen who are ruining it for us. This is probably why we haven't seen a new Jabba, since the blasted SE and Ep1 crap versions rotted on the shelves. Thus the retailers think Jabba is an unwanted figure and will probably never order him again.