As everyone else said, they’re floppy disks with the plastic case removed.
Since you found them in a church, could they have belonged to a church bell system? I’ve seen other church bell systems in the past where the songs came on weird mediums.
This is just a random guess, I don’t know why anyone would remove the casing.
It’s for accountability.
How do you undeniably prove that a random person won the grand prize, and that the lottery employees didn’t just embezzle the money for themselves? Dox the winner!
Yeah it sucks, but there’s not really another “undeniable” way to do it. If they kept it anonymous and hired an auditor to verify it was fair, how do you prove the auditor isn’t in on the scam?