Fak. The most unfair of all things is when they intentionally set specific time for people to have 1% chance to get something rare, and then they turn the time switch off and the rest hours of the day is certainly 0% to win anything. Following the rules of probability, there's no way someone who had spent 50k ingots and not have the slightest chance to win the rare. The most logical thought is that they just flat out set a very short "window" of time to turn the "win chance" switch on, and turn it off the rest of the day. An on/off switch as to the 1% chance to win anything.