Publisher PSA: Mountaindale Press Requires NDA to View an Unsigned Publishing Contract
The publisher, Mountaindale Press run by Dakota Krout, requires any potential author to sign an NDA to even view the contract. While they claim the reason they do this is to protect the contract from being stolen, something like this could just as easily be used to silence authors about how predatory the contract may be.
An NDA that goes into effect once you sign a publishing agreement is entirely normal, but one to just see the contract is not.