The Three-Question Business Test
Before entering a market, ask: is it big and interesting, can we make it better, and is it a good business to be in?
Rubin's filter for vertical selection. A market must clear all three gates: (1) big and interesting (large TAM), (2) we can make the consumer proposition materially better, and (3) it is structurally a good business to operate in. Ticketing failed gate 3 ('most customers hate the ticketing company they buy from'); media failed because incumbents like Amazon, Apple, YouTube and Netflix were entering. Betting and collectibles cleared all three.
- A big TAM alone is not enough — a market can be huge and still a bad business to be in.
- If most customers hate every existing provider, that is a structural red flag, not an opportunity (ticketing).
- If giants are obviously about to enter, watch and learn rather than fight for it (media).
- The strongest entry is a big market where you can make the consumer proposition demonstrably better.
Applied in 2019-2020 when Rubin decided to reinvent Fanatics from a fan-gear retailer into a digital sports platform. He explicitly listed the candidate verticals he looked at — fan gear, trading cards, betting/gaming, ticketing, media — and ran each through the three gates before committing to three.