You enter into a contest only to find out that Fan Duel voids my ticket 6 minutes before game time. I asked for a refund and got a response to update my app from technical support. I called the technical support phone number, voice mail. My fault, I am out of over $2k in winnings because they suck at customer service.
Too good, nah, I am giving my business to their #1 competitor Draft Kings and forwarding my documentation to the authorities that govern this grey area industry. Example: at best, you put in $10 on a line up and win a total of $18 or $20 after they get their percentage. No refunds, technical support or good business here. You are better off going to your local casino, at least you can watch your money leave your hands.