Would you kindly tell me if you believe that the probability of them refunding a duplicate bet that lost is greater than 0.0%.
Yes, as per FJ answer above I would expect them to refund duplicate bets that exceed 100k (i.e. invalid bet according to their TOS).
Let us know if you experienced otherwise.
I am not the only person playing at FJ. Let other players tell us about if that happened to them, but as far as I'm concerned I'm done with this idea of yours because it's so stupid and can only fool 0.1% of people and not interesting to me.