Alien Collectors

You are one of 100 humans who aliens have abducted. The aliens have taken interest to everything found on Earth, including its nature, as most of it doesn’t exist on their planet. Each day, the aliens will drop you all off somewhere, and ask you to collect as many things as you can. But they only want one of each thing. Any duplicates, even between people, won’t count. The aliens will offer money for each new thing you bring to them, but don’t collect enough and you will be killed. And some of the contestants will do anything to win.