i guess a lot of people have had the same problem with a lot of agencies not every one can get work but it's probably more noticible with an agency like bk because they tend to say yes to a lot more than some other agencies but they do turn people down.
but i think it's a bit harsh to call them a scam even though i understand you have reason to be pee'd off with them.
i have a couple of friends who have had plenty of work from them and my eldest dd also did a job through them, all be it, it was only ever one job but hey it was a job and we've been to many jobs and castings over the years and 9 times out of ten bizzy kidz have been represented more than i can say about a/k, i/k and c/k never seen any of them at a casting how the hell can any of us be sure which agency is real and which is a scam there are so many out there and your always going to come across someone who's had a bad experiance with every agency, this is a risk that we have all deceided to take we will never know who is the safest bet. it's a harsh industry