Optmyzr’s new three-year study confirms what many performance teams have felt intuitively:
Over-engineering Black Friday with seasonality adjustments often does more harm than good.
Across 2022–2024, advertisers who manually applied seasonality adjustments saw:
- CPC inflation nearly double compared to those who didn’t
- ROAS drop between 10–17 percentage points
- And most importantly: no meaningful efficiency gains, despite higher conversion intent already baked into Google’s Smart Bidding
The takeaway?
We’ve entered an era where algorithms anticipate consumer behavior faster than marketers can “signal” it.
What this means for advertisers in 2025/2026
Consumer intent is predictable; the auction is not.
Smart Bidding already models BFCM spikes — adding manual forecasts just accelerates bid inflation.
The cost of misprediction is higher than ever.
A 5–10% forecasting error becomes a 20–30% CPC penalty in peak auctions.
Revenue ≠ efficiency.
Yes, seasonality adjustments sometimes drive more top-line revenue — but at the cost of margin erosion. For most brands, that’s not a trade-off worth making.
Ad automation has outpaced advertiser intuition.
The role of the marketer isn’t to “tell the system what will happen,” but to build guardrails, maintain pacing discipline, and orchestrate creative, offer, and audience strategy around the peaks.
The new BFCM playbook
At Brand IQ, our stance is simple:
Let algorithms handle predictability. Let humans handle strategy.
Smart pacing > manual uplift
Creative iteration > bid manipulation
Audience sequencing > seasonality toggles
First-party data > reactive adjustments
Because the truth is:
BFCM is no longer a bidding competition — it’s an execution competition.
Brands win not by shouting louder in the auction, but by aligning message, offer, timing, and relevance with machine-driven precision.
Black Friday has changed. Consumers have changed.
And advertising is now a balance of automation, intelligence, and restraint.
