Fund the fat tail
Most of marketing's value comes from a few winners nobody could have predicted. Which means an optimiser that chases the average doesn't just miss those winners — it quietly designs them out. The job of a planning model isn't to remove that risk. It's to fund it on purpose.
Marketing is fat-tailed
Rory Sutherland, drawing on Nassim Taleb, frames it bluntly: marketing is fat-tailed. A small, unknowable fraction of what you do delivers most of the value — and you can't tell which fraction in advance. Amex's "Member Since," names on Coke bottles: low-cost ideas that turned into outsized outcomes precisely because they didn't look like safe bets beforehand. The danger, in his words, is structural: if you only optimise for average uplift, you'll design a system that's incapable of producing outliers.
Not everything that makes sense works, and not everything that works makes sense. — Rory Sutherland, Alchemy (2019)
The trap a naive optimiser walks into
Maximise expected mean outcome and the math converges on the safe, the proven, the conventional — the allocation everyone else with the same data also lands on. It strips out the brave, spreadsheet-defying bets (a fame play, a new channel, a creative swing) exactly because their average looks unimpressive next to their variance. That's how an "efficient" plan becomes a fragile one: optimised for the world as it was, incapable of the breakout the world rewards.
Why Curvio reserves budget to explore
So Flux doesn't just maximise the mean. It runs an explicit explore / exploit split: most of the budget goes to the calibrated, efficient core — and a protected exploration allocation funds the bets the curves can't yet vouch for. The model sizes and de-risks the safe majority precisely so you can afford the minority that might be the fat-tail winner. It's effectiveness over efficiency, made operational: the plan keeps a seat at the table for the idea that looks wrong on a spreadsheet.
Quant in service of the brave bet
This is the whole point of modelling the measurable well: not to optimise marketing into a tidy efficiency machine, but to make the unmeasured, non-rational bet affordable and accountable. Curvio is precise about what can be measured so you can fund what can't. The spreadsheet earns its keep by paying for the magic — never by replacing it.