When you enter a slot tournament you are given a session time for your play. The play is done on a set of machines that are programmed to hit at higher rates than normal. You do not put money in them. They are set for a time period, like 3 or 5 minutes, or a credit amount (I've seen both, not necessarily in Las Vegas.)

The chance to win big for a small investment: since slot tournaments can attract a large number of players, this also means that many buy-ins contribute to the prize pool. Considering that everyone has an equal chance of winning, there's a good chance you'll make a tidy profit on your investment.

Re: Libertadores Cards do not count as rares in the Icon SBC's Bronze&silver. +1 and this is a major bug. These cards take up rare slots in packs that EA sells and advertises as having guaranteed rares, and they are absolutely defective because they don't work as rares in the majority of icon SBCs.