quick "sticky" of active sfio brokers might be good idea and answer repeated questions..i'm with zecco, a bottom-feeder that chomps at every nickel and dime they can get.
Stands to reason why the big 3 won't transfer shares out: if any of them at all are naked shorts, kinda hard to transfer 'em then. And while most ppl's shares are real, they can't very well differentiate or it'd put 'em in a big pickle, transfering some ppl's shares and not others.