I do not think GR assets are allowed even with watermarks – with permission from the author maybe ok.
might be temporarily removed but authors have the right to remove files as and when they want.
Email the author and ask them
Depending on where they are from not without license or permission (except Photodune – that is allowed with watermarks).
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
You are probably using the wrong file.
In your downloads click ‘download’ and select ‘installable WordPress File Only’ and use that one
Aside from the footer links to a separate marketplace and you are an exclusive author it is not even close to the required standard.
Forge tit and start something else
Typography is not good and very inconsistent
Spacing and padding issues (especially team)
Some images look stretched (especially Samsung Mock up)
Generally needs a lot more attention to detail and more to it