If you want that magazine style theme then http://themeforest.net/category/wordpress/blog-magazine has loads – these themes still won’t solve the login and reward system.
Plus just so you are aware if you wife pans to charge people to use /advertise etc on the site then she may need an extended license (theme dependent)
You could use whatever theme you wanted because those requirements are going to need to be custom built. You won’t find a theme that can do that on a marketplace like this and while there are maybe some plugins that could do ‘some of the features’ you are talking about they are unlikely to be exact and even then will require careful integration with any theme.
Bottom line that site sounds like it would be easier to hand build from the ground up
While its easily fixable this will never pass http://validator.w3.org/check?uri=http%3A%2F%2Fdemos.skyres.net%2F01%2FDemo1%2520-%2520Image%2520-%2520Overlay%2F&charset=%28detect+automatically%29&doctype=Inline&group=0
your code needs to validate
Typography is not good especially the font choices and consistency
The spacing and padding is all over the pace (just look at the subscribe section)
Generally it does not feel premium at all and needs more to it- even coming soon and error pages on here have stepped up a gear and need to be more ‘clever’ and unique to be able to compete