By doing other people's tricks you are getting THEIR applause.
Now this is obviously not literal. When you perform Kevin James' Bowl-a-rama he doesn't get the sensation of thousands of voices crying out in agony. However the sentiment is indeed there. By doing something straight from the box, with the stock patter and presentation it came with, doing same old BS everyone else does you are effectively not getting any personal satisfaction for the performance.
Oh I know you think you are. Just because people put their hands together in a loud cacophony when you're doing something nifty doesn't mean it's for YOU. If you want people to give you the clap
There is nothing more gratifying than performing something you created OR taking a pre-existing effect and truly making it your own. Do they know the difference between something you bought and something you created? No not really...
But you do.