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Very high odds. Employ stake limits (betting limits), not win limits. The bigger the event, the higher the limit. Can vary from $5k to $1M. Established 1998.
Perhaps the highest odds, margins as low as 2%. Top tier daily maximum win limit of €250,000 or equivalent. AdvanceBets let you bet on zero balance.
Top tier football max daily win limit of £250,000 or equivalent. Football Tier 2 & other top sports £100,000. Bet Builder. Simple early cash out. Licensed in Belgium.