This would be a great addition to Tixio. It could be the basis to sync with so many SaaS out there that requires Leads / People & Organizations data. The more fields the better, but the cherry on top of the cake would be the option for us to add custom fields into it. Then with integrations, we could sync the data with our favorite CRM's, ESP's, etc.

Would recommend for you to take a look to https://hexospark.com/pricing/ and register for a free account. Their chrome extension can grab all the details from a linkedin profile (or grab emails from other websites) and save into the users database. A lot of fields are already in there, despite some important ones to be missing. Tixio Chrome extension could benefit of this feature as well.