What is the difference between a Premium and basic account?

Here are all the Premium services available with a comparison to the services for a basic account:

• Merge duplicate contacts as often as needed and restore from backup. Removes all the duplicate entries from a contacts list at once.
• With a basic account, you can merge your contacts one at a time
• Discovers new information for new and existing contacts from email conversations and syncs to all devices automatically. You'll receive a notification when a new contact is added.
• With a basic account, contacts will not be added automatically, and you'd have to individually decide which contacts to add from what EasilyDo finds
• Add contacts automatically from Salesforce
• With a basic account, you can not add contacts to Salesforce
• Real-time email discovery from important email notifications to restaurant reservations, boarding passes, and many more.
• With a basic account, discovery is not real time, but you still get information pretty quickly
• Ability to create up to five 'Important Email' Alerts
• With a basic account, you can only create one 'Important Email' Alert
• Auto-forward receipts for expense management
• With a basic account, you can not auto-forward receipts
• Receive up-to-the-minute travel notifications for delays, cancellations, and gate changes.
• With a basic account, you will not receive real-time travel alerts