They don't have to and also this IS your fault and rolling into a lottery like this may complicate taking your vote out of it in a figure of speech.

Try again next week and if you do win at least you got a house that you then can relocate to a new one with the next lottery going on or something down those lines.

Would need to be fair for all, and if everyone could ask getting their ticket taken out and refunded GM's would have nothing else to do.