No problem, we're happy to answer any questions you have :)
1) Currently Clipper does not include integration for feeds off other websites as you describe. It does have an
import tool though, which allows you to import coupon data in bulk. AppThemes does not officially support third party plugins, so unfortunately we cannot guarantee that plugins of this nature would be compatible with the theme.
2) Yes, you can make registration unavailable and remove the "share coupon" button from the sidebar widget options.
3) Our themes are not encrypted, so you are free to customize them as you wish. For doing this we recommend the use of a child theme in order to retain your changes in the process of an upgrade. You may like to read some of our documentation on
theme customization to get an idea of what is involved. Thanks.