I use Crono mainly to find email addresses of prospect clients and to run sales campaigns. It helps me better profile the database and I appreciate the ability to find new contacts. Additionally, it allows me to run campaigns and work on analytics, which is very useful for identifying who has the most interest in our services and creating ad hoc campaigns for these contacts.
I like how fast it is to use Crono for email searches. Also, the connection with LinkedIn to search for contacts, emails, and phone numbers is something I find really useful and use a lot.