Absolutely correct, the rivets compress the two layers of mylar, or whatever the composit polymer is, together so that they are touching, the coin is obviously thicker than the two layers of poly and will never come close to the rivet as long as the upper and lower surfaces of the rivet are not radically different from one another, the thickness of the coin is a factor in the differential between the two parts of the rivet before a coin may contact one of the segments but it's late and I'll have to think about it more when I have time.
I wouldn't call the "packaging" a novelty, it's pretty common for some world coins. The coins are essentially "slabbed" as far as world coins go.
One of my favorite designs, I'm putting together a set from '58 to '68. Looking for quality pieces with lavender/purple rim toning, just picked up two more that meet those qualifications.