Many times the annotations to an old game include the information that it won a brilliancy prize (I have even seen "4th place brilliancy prizes"). I know there used to be money attached to these, so perhaps it was a means to make the tournament more attractive when the purses were not so big, and for patrons to play small-time sponsorship (put a small prize with your name instead of the full competition award).
Are brilliancy prizes still awarded? If not, why?