PrizePicks: 'power' (all legs must hit, max payout) or 'flex'
(consolation payouts on partial hits, lower ceilings).
Underdog: 'underdog_standard' (all-or-nothing) or 'underdog_flex'
(partial-hit consolation; Underdog calls these "Standard" and
"Flex" but we prefix to disambiguate from PrizePicks).
Play tiers per app: