HaLeiVi
The difference between a chinese auction and Kupat hair is that the CA gives you a chance to win a prize whereas KH PROMISES/GUARANTEES a prize (i.e. yeshuah).
Another difference: KH TAKES ADVANTAGE of people who are vulnerable, who need Yeshuos. CA’s don’t take advantage of anyone.
One more: CA’s have fixed prices per draw. No-one is encouraged to pay up life fortunes to enter.