I didn't say it was 99% not a scam. I said someone else said that it was 99% a scam. I would say my belief now is around the 10-20% range, so a bet on 10% seemed fair to me, considering how loud people are shouting SCAM.
Demanding a 50% bet when both people think the odds are less than that is unfair.
Those confidence numbers don't reflect your proposed wager.
Here is some help with the math :
https://en.wikipedia.org/wiki/OddsI meant 10-20 odds that it is real (or at least will last for another few months.)