I pretty much agree with Draven!!! However on your friend's opinion: Its a business!!! Their jobs!!! I get that, so yeah they gotta feed their families. As for the rehashing part. I guess its true to a certain extent. Here's the difference, sometimes it takes a rehash or a retooling to actually make us ,as magicians and fans see the potential of a core effect. Its like Wayne Houchin's Thread vs The Indian Bean mystery where the thing comes out the eye. From a core principal, its the same thing!!! Yet, i think its pure genius how Wayne took something so simple and made it scary looking!!! The same can be said by Marc Spelmann's "Orfices". Kool effect, but pretty much the same thing!!! So its a 50/50 statement. Its about the core principal, but when you can dress it up to where it looks different, thats genuis.
I can recall Banachek & Wayne Houchin's "Stigmata". Dude when I was 9 (1993), we (my classmates and I) use to do the same thing by using the entire effect in making realistic unremovable (temporary) tattoos, which stayed on your body for months before fading away. Yet when I saw how Wayne used Stigmata, I was like. "Damn, he made it big off that? I could have released that!"
If you don't believe me draw a small number on your body with a pencil or marker and do the workings of Houchin's Stigmata over and over, you'll find that you have created a temporary tattoo!