Underdog promo

founder codeCA

Play $5 Get $100 / 50% match to $1000

The real math

verified 2026-10-05

Disclosure: this is the founder's referral link — he earns a bonus when you sign up with it.

Terms change fast — verify in the app before claiming. Full terms: $10 min deposit; 1x playthrough; bonus expires 14d

Underdog Predict — prediction markets inside the Underdog app (own CFTC exchange). No separate promo; uses the main Underdog offer.

What this company has been in trouble for, and how the business works. Lawsuits describe allegations in complaints — not findings of liability.

2024-01 — Arkansas cease-and-desist (pick'em = player prop bets) — Withdrew. source
2024-01-31 — Florida Gaming Control Commission 2nd-round cease-and-desist — Exited FL Mar 1, 2024. source

2025-07-01 — Head v. Underdog Sports (N.D. Cal.) — CA class action challenging DFS contests under CA gambling law — Pending. source
2025-08-26 — Koning v. Underdog — alleges company hid 'true nature' of games as illegal sports bets; plaintiff lost ~$2,200 — Pending. source
2025-07 — Almeida Law Group CA class action vs Underdog — Pending. source

Rips packs (loot-box-style randomized reward packs) Variable-ratio reinforcement schedule (same mechanic as slot machines). (Documented product mechanic; behavioral mechanism per gambling-research literature)
Bonus/promo funds expire in 7-30 days (documented in current offer terms) Scarcity/urgency — expiry pressure forces play volume over selectivity.

Named mechanism = the behavioral trick each practice runs on.

Acquired by IG Group for $2.15B (2026). Investors: BlackRock, Acies Investment, Spark Capital, Mark Cuban, Kevin Durant (Series C $100M, $1.225B valuation, early 2025).
Trade groups: Coalition for Fantasy Sports.