Potemkin  Village-from The Free Dictionary :

“something that appears elaborate and impressive but in fact lacks substance”

Supposedly, the phrase comes from fake villages Gregory Potemkin built to deceive/impress Catherine the Great.

Valley of Death-or Death Valley curve-from Investopedia

“A slang phrase used in venture capital to refer to the period of time from when a firm receives an initial capital contribution to when it begins generating revenues. During the death valley curve, additional financing is usually scarce, leaving the firm vulnerable to cash flow requirements.”

Now to use them both in a sentence

Into the Valley of Death

Rode the brave Potemkin villages


The company tried to conceal its Valley of Death status by setting up Potemkin village servers.