My business had just suffered its worst month in years. Things had been going downhill for a while, but I had remained hopeful. “Any day now,” I’d tell myself, “things will turn around.” They didn’t.

Ross Sapir knows what’s inside the homes of thousands of influencers. That’s because his company has moved their production equipment, squiggly mirrors and other social-media-bait décor—“crazy s—t, ...