No. He's saying with prepaid, you don't have to pay a monthly fee if you don't need continuous cellular data on your iPad. You can just sign up and buy data on demand (via Settings - Cellular).Perhaps I’m just ignorant, but this sounds contradictory.
It sounds like you’re saying that there isn’t a monthly fee if you pay the monthly fee.
I believe @kipwheeler meant that any monthly fee (regardless of whether for data or line access) wasn’t worth it for his use case. I could be wrong though.
My main iPad is on my regular mobile share plan for $10/month. My backup iPad, I have on the $10/5GB/150 day pass on T-Mobile.