So what if two or ten people hit the aspirin in the same round?
Each shooter got their own card with their admission fee. The last time I did this was back in my college days. I recall paying $1.00 per bullet. I bought 5 chances and hit the aspirin on my last shot. So, the frozen turkey that sold for about $10.00 back then cost me $5.00. I came out ahead. Most people couldn't hit it so they lost money.