First (two to) come, first (two) served!!
You can use this on Amazon for cloth diapers - you just have to make sure the item is sold by Amazon - what I do to figure it out is put in "Cloth Diapers" in the search field, then on the left of the results you'll see a section that says "Seller" - just make sure to select Amazon.com over there, and then everything that's left should work.
I used one on fleece liners, disposable liners, and a Blueberry cover and another on some KL0s.