I don't really think that this is a fraudulent project and i kinda like the idea because i think it's pretty funny. If both partners are really into crypto then it makes sense for them to also create an own NFT which shows that they are not only married in the real world but also within the blockchain. In the end this stuff is just for fun because the project can not control if the 2 adresses are really belonging to a married couple or if both adresses belong to the same dude.