Fee or Free with a value add option People are accustomed to free service for social networks. The draw of a memorial could be a loss leader to attract people to sign up for other services. Value added services such as linking to donation pages or allowing for video uploading may not be too bad.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.