Some of these are not theme/AppThemes specific questions, but I'll do my best to help clarify..In answer to your questions:
1) This is one of those non-AppThemes questions because when it comes to purchasing our themes, you pay once for the lifetime license and 12 months worth of theme updates and support (you can renew the subscription every 12 months for $29 for a single theme). Outside of this, you need to organize your own hosting and domain name. You can read about our preferred hosting partners and related discount
here. How much you pay per month, depends on who you sign up with and what kind of plan you choose.
2) This again isn't AppThemes specific, because it's still up to you to market your site in order to get enough people through to click affiliate links or post coupons (depending on your main idea for making money off the theme).
3) In short, no. We create the theme and provide optional plugins such as icodes publisher or commission junction publisher in the
AppThemes marketplace which will give you options for automated coupons. You can also use the forums to discuss ideas with other community members.
4) Yes, absolutely. Adding categories is done by you anyway, you can do this at any time. The theme is not encrypted, so yes you are free to modify it as you wish or use a child theme.
5) We don't officially support third party plugins, so we cannot guarantee that all plugins will be compatible.
6) No, the default is as seen on the
Clipper demo site.
7) AppThemes does not officially support customizations, however you can seek community based help in the "General Discussion" section of the forums. We provide support for default theme functionality though.
8) There are no immediate plans for it at this time. Thanks.