I frankly wouldn't really care if he were to perform it. I do think he needs to start creating more material, but I wouldn't care. The way I see it is this, not all spectators watch Criss Angel, and the ones who do are going to see you do something he did. Which in their minds makes you better than that guy on tv. So this creates a massive reputation for you.
Second there are tons of videos that teach the effect on youtube and many others. Isn't this worse than Criss performing it? There are many moves that we do as magicians that profesionals have done on tv, that people still love! Braue Pop Up move, Saw, Sinful, Shapeshifter, and any ACR imaginable. And these are some of are hardest hitting material.
So really don't worry if a few hundred people somewhere in the world see an effect you perform a lot on tv. Besides you should be performing stigmata as a closer so they think you can do real magic and you hit them harder than ever ending with stigmata.
Thanks for reading,
Zero