One Mile at a Time notes that Alitalia is giving away 2k miles for signing up for their rewards program (by March 30th, an additional 2k for flying with Alitalia, and an additional 2k for having any activity in the account within 3 months.
Dropping in 1k membership rewards points yields 5k Alitalia miles. It’s not quite a business class roundtrip to North Asia (90k), but it’s a start.