What I don't get is why is there, say, "$50,000" instead of "$37,501 - $75,000" range? If it is the same, why don't we use the scheme for monthly betting we've been accustomed to?
It may be that someone requested that specific amount quite a while ago. For the
end of November the spreads go up to "more than $25,000" which is very self explanatory (and paying out 48:1) - the $25,000 is most likely to be the payout amount.
In any event $25k-$50k spread for
the end of 2020 means the price would have to go above $ 37,
500.01 (not one dollar) for it to be closer to $50,000 than be closer to $25,000.
That's true. Thanks for correcting me!
It'd then have to leap above $75,000.01 for it to be closer to $100,000 than $50,000. So again, $25,000 is looking likely to be the payout figure for both "end of November" and "end of 2020"
As for the "end of November", even if BTC reaches $24,999.9, the payout figure will not be $25k because it is clearly stated: "More than $25,000", and we also have "$20,001 - $25,000" range which is going to win that case.
There's something new in the ranges you can bet on regarding BITCOIN PRICE - DECEMBER, amd I don't get it.

Which range is the winning one, if they price, say, $19,700? Was it a mistake or intentional, meaning that both ranges win?