RNG Fairness

[Evergrey]

If the zero was only added and the count was not shifted by 1 because of it, then there’s absolutely no need to re-roll and the result is fair because the odds were equally lowered for everyone.

For example, if 4 people entered the lottery, each would have had a 25% chance to win, but if they dropped a 5th “zero bidder” into the mix, all it means that now all 4 real people simply had a 20% chance of winning… and there was a 20% chance that the drawing fails and hits the zero. If it didn’t, though then how exactly is it unfair?

Only those cases where zero actually won need to be re-rolled (and the single bidders should just get the house, of course).

Because like you said, instead of a 1/4 of winning it turned out to be a 1/5.
The 0 just acted as a ghost-vote with no person behind it.
If the winning roll was, let's say a 23 (on a roll of 1-100), then person nr.1 would've won on a 1/4 with a 25% win rate. But thanks for the "ghost" that means the 2nd person won due to nr1 got shifted lower.
Meaning the results were altered due to the ghost, ending in that all results were tainted.