How to setup a unified user/subscriber database for multiple plugins?

We have just subscribed to your dev. service and would like your assistance in better understanding the integration between some of the plugins.
1. In particular, we are looking to have a unified subscribers/visitor database, which is connected to some of the following plugins functionality;
• Social Marketing
• Floating Social
• Pay with a Like
• Affiliates
• Automessage
• Fundraising
• Pay Per View
We are currently using the WP “Landing Page” A/B plugin. It creates a subscriber/visitor database and measures conversions. So we need to know if the database that is created by this plugin, can also be used by your plugins that we listed above.

2. Also, we are currently using WPML plugin, and wanted to know if your “Languages for WordPress” has the same functionality, and if there is any advantage moving to it?
Please advise ASAP.
Many thanks, Lee