I'm not sure if the link you provided supports the conclusion that Dan Ariely is "almost completely discredited". That seems overly harsh. Quoting from the tag line, "Renowned psychologist Dan Ariely literally wrote the book on dishonesty. Now some are questioning whether the scientist himself is being dishonest."

For what it's worth, the placebo study relevant to this discussion does not seem to be on the list of disputed studies from what I can tell [1]. That said, I'd be curious to know if that one also failed to replicate, please share if you have knowledge of this.

[1] https://en.wikipedia.org/wiki/Dan_Ariely#Accusations_of_data...