Second-order revenue (events)

Event P&Ls are built around first-order lines — stand sales, tickets, sponsorship — which quietly miswrites strategy, because much of an event's real economic engine is downstream. The startup that attends this year and books a stand in two years, the speaker whose talk seeds three sponsor conversations, the hosted buyer whose recommendation delivers a whole national pavilion: none of it shows up where budgets get argued. Taking second-order revenue seriously changes decisions at the margin. It justifies investment in things that look like costs first-order — generous startup pricing, hosted buyer programmes, year-round community, genuinely good content — because they're acquisition channels for future high-value customers. In practice, you make it visible with honest-enough tracking: tag each new exhibitor and sponsor with an origin story at the point of sale ("how did this relationship start?"), watch attendee-to-exhibitor conversion across editions, and review the paths your best customers actually travelled. Precision isn't available; direction is. The common mistake is the opposite instinct — cutting whatever doesn't directly invoice, then wondering three editions later why the exhibitor pipeline thinned. The honest nuance is that second-order arguments can also excuse genuinely underperforming products, so pair the narrative with those origin numbers: if nothing measurable ever converts downstream, the flywheel story is just a story.