Some authors describe hoax's used by magic users (cant remember the exact source but it was in Daniel Ogdens Magic, Witchcraft and Ghosts in the Greek and Roman Worlds: A Sourcebook). However illusions I'm not sure are ever described purely for entertainment purposes(happy to be corrected on that), but theres a probability of it having been done. As far as the economics of say a travelling illusionist goes I would say it would be hard to make a living doing so, however magic users are often described as door to door salesmen and some are said to have made a good living off it(same source as before, might be Plato who talks about the trend). Having illusionary skills may have helped with that trade, who knows? hope this was helpful.

Check out the character of Kalasiris in Heliodorus' Greek novel Aethiopica. He's an Egyptian priest who bemoans the fact that there are people out there making the unreal seem real, while he's actually communing with the gods with true wisdom (3.16). But then again, he's also not above 'putting on a show' to meet the expectations of his audience: tossing his hair around, pretending he's possessed, producing smoke, drawing objects out of fire, etc (3.17, 4.5, 5.13). The line between entertainment and religion seems to be constantly muddied.