You are taking a bit sequence from a file with over 1024 bits and the layout parameter is only 16. Since the first 16 bits in your file are all 1 changing the bit rate will have no effect. Changing the layout parameter Sequence length to 1024 and you will see an effect of the bit rate on the output.
I’m not really sure about the last part of your question. This seems more like a Matlab programming challenge. It also seems like you want to use the Binary Switch component as a simple modulator. You can use anyone of our other components to do the same thing. It might be simpler.