The concept of encrypting the seed on one PVC transparent sheet and the encoded noise on another, such that when they both are overlayed the secret can be revealed. I had two questions pertaining to how this would be useful in a real time scenario:

1) As compared to regularly storing our seed on a paper / printing it on a thing sheet of stainless steel vs that on the revealer, I'm noticing that in both scenario's we can still maintain a form of two-factor backup. For example on a paper wallet or writing our seed on a paper we can store few words on one sheet of paper and other set of words on another. Place both of these papers in different secret lockers of yours and it'll still be useless for a theif to steal just one paper. I feel that the price of the revealer (i.e about 20 Euros) is a bit costly as compared to simply writing our seed and splitting it on two pieces of papers or even more. Would users in this case have any other security enhancement use cases by using the revealer?

2) If I have multiple seeds / wallets then do I need to order multiples of these or can multiple of them be printed / stored on one PVC sheet?