Sell-Out is Mustard's framework for driving ticket sales across the full funnel, from first awareness through to purchase, using audience intelligence, funnel architecture, and structural urgency design. For Truck Festival 2025, the approach meant rebuilding the conversion path from sign-up to pre-sale, which had been losing momentum in the gap between registration and first purchase. Once that gap was closed through a rebuilt sign-up architecture, the sign-up uplift (29.12%) translated directly into a matching pre-sale uplift, confirming the funnel logic was working.