That's not the correct way to figure it out, that's why I posted, to find out what the correct odds are. This explanation completely ignores how the number is generated, so cannot be the correct odds for each tier. This would be correct if a number was randomly generated between 0-10000 (except in the case of the last tier, he's wrong on the odds, it's 1:10,000; not 1:20,000). But that's not how the number is generated. It's far more complex than that and the process was detailed in my original post on the matter (and quoted above).
Okay, I thought it was correct since nobody said it is incorrect when it first was posted.
But where did he make the mistake to make 10k to 20k?
For some reason I can't figure out, he said the odds of rolling a 10,000 were 1:20,000, but that doesn't even make sense since the largest number you can roll is 10,000. There aren't 20,000 possibilities, so the odss can't be 1:20,000. If 00000 is a possibility, the odds would be 1:10,001, since there are 10,001 different possibilities.