On scenarios when your printed/written seed phrase is in a risky hiding place, this could be a good layer of security.
With a "
noise paper" as your stored backup (
in a vault), even if someone get access to it, he will find it harder to (
or never) be able to read the written/hidden seed.
But this could backfire to the user, according to the site:
If I loose both cards, can you provide a replacement?
No, sorry. Each revealer is unique and we don’t keep logs, or know what revealer is sent to whom. We send two identical cards because we consider it enough for redundancy, if you would like to have three identical cards let us know and we will consider for future products.
If you lost your revealers, there will be no way for you to recover your seed unless,
you have another non-encrypted copy of your seed somewhere (
but if have one, why did you even use a revealer?).
Here's my honest opinion: The "
revealer" thing is just a gimmick, like Hardware Wallets.