Err...The truth? Not all escorts need to cover up - they can charge what they want.
It's already been explained to you that a girl can do what she wants with other clients as long as she provides a standard service to all clients as according to her profile.
Seems to me you were not given free 'extras' because she doesn't find you (delete as appropriate):
attractive;
irritating;
entitled;
uncomfortable to be around;
all of the above.
I have had new girls giving me many extras who become regs.
I have had new girls who provide a standard service. I don't see them again.