I think you will need to market this service either more satirical or more serious, not in the middle. The reason memes work, it allows people to become part of the joke, your current messaging is too safe not satirical enough and it makes people feel they are not PART of the joke but THE joke if they sign up. It's a subtle difference but will make or break the idea. If you decided on serious, then make the service a site were people can upload photos, post stories, memories...like a virtual memorial about someone to memorialize them. It's also much easier to collect from the living then the dead.
