Question
The theme should be able to accomplish the following:
1. Visitors to the landing page sign up or complete a couple of questions
2. Upon signing up, the page generates a special URL for them to share with their friends (to create virality).
3. Use the URL to track your most active referrers and reward them for spreading the word.
The closest I have come to is http://launcheffectapp.com/ but their designs look terrible for our purposes. If I could replace theirs with a beautiful landing page that might work. Could anybody help?
Answer
You can use any theme for this purpose. and for the functionality you have to build a WP plugin that will offer the features.
I build a similar plugin a year ago for one of my clients.
It may cost 1K USD to build the plugin.