The backstory here is a bit more complex. The "powder" is entirely safe and the blogger was spreading disinformation while also running an incentive/referral site of their own while being connected to a competitor (GhostBed). Whoops.

https://www.legalreader.com/ghostbed-vs-purple-mattress-laws...

https://nonbiasedreviews.com/was-honest-mattress-reviews-bro...

etc.