Underdog's Fantasy-to-Sportsbook Funnel

This claim matters because fantasy is not just a neighboring product for Underdog, it is the cheapest and most natural on ramp into sportsbook revenue. A fantasy user already has a funded wallet, knows player names and odds like game mechanics, and is used to opening the app around live sports. That makes the jump from drafting teams or picking player outcomes to placing bets much easier than trying to win over a cold customer from TV ads alone.

• The historical playbook is clear. DraftKings and FanDuel used daily fantasy to build a large user base before sports betting opened up after PASPA was struck down in May 2018. By 2018 they had about 5 million fantasy users and roughly $520M in combined revenue, then converted that base into sportsbook customers as legalization spread.
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• The cost gap is what makes the funnel so powerful. Fantasy customer acquisition has run at roughly $50 to $80, versus roughly $500 to $800 for sportsbook users. In practice, that means Underdog can acquire someone through Best Ball or Pick'em, keep them active for months, then promote sportsbook bets inside the same app and wallet when regulation allows.
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• This is now a core competitive pattern across sports consumer apps. Fanatics is doing the same thing from merchandise, using a 100M plus fan database and about $19 CAC to cross sell betting. The difference is that Underdog's audience is already behaviorally closer to betting, because they are paying entry fees, tracking outcomes, and returning frequently for contests.
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Going forward, the winners in sports betting will not just be the companies with the biggest ad budgets, but the ones with the best feeder products. For Underdog, that means fantasy is both a standalone business and a distribution engine. As more states open, the company can keep turning fantasy engagement into sportsbook revenue with less paid marketing than a pure sportsbook entrant.