The FTC's staff report Bringing Dark Patterns to Light, published in September 2022, contains the useful finding: the timers frequently do not correspond to anything.
The report documents countdown clocks that reset when the page is reloaded, low-stock indicators unconnected to inventory, and deadlines that recur indefinitely. Enforcement actions have followed against specific operators for precisely this.
That is the detection principle, and it is unusual in this guide because it is a physical test rather than a judgment.
The mechanism being defended against is chapter 277's. Scarcity operates through two routes — rarity read as quality, and reactance against a closing option — and it does so on your arousal rather than on your assessment of the thing. Worchel's finding was that becoming scarce beats being scarce, and that scarcity attributed to competition beats scarcity attributed to accident, which is why the effective forms are all dynamic and all involve other people.
The early signals are somatic and are worth learning to recognize, because they arrive before the reasoning does. A quickening. A narrowing of attention onto the object. A sudden reluctance to close the tab. The feeling that you should decide now and think later, which is exactly backwards and is the state the design is producing.
The detection protocol has three steps and takes under a minute.
Reload the page. If the timer resets, it is decoration.
Wait. Come back in an hour, or tomorrow. A genuine constraint persists; a manufactured one either persists in a way you can verify or quietly renews.
Ask for the constraint's cause. A real limit has a reason somebody can state — the venue holds four hundred, the run was two thousand, the supplier's allocation is fixed. A manufactured one is asserted, and if you ask why the deadline is midnight you will get a fact about the offer rather than a fact about the world.
The counter-response is a standing rule rather than a case-by-case decision, because the whole point of the mechanism is that it degrades case-by-case decisions. A mandatory delay proportional to the amount: an hour for small purchases, overnight for anything significant, a week for anything that changes your circumstances.
Worchel's result gives you the question that cuts through all of it. Scarcity acts on your desire, not on the object. So: what would I pay for this if there were a warehouse full, and did I want it before I learned I might not be able to have it.
This counters Law 7.
Counters Law 7, Manufacture Scarcity and Let Desire Do the Work