Alitalia (an Italian airline that is a member of skyteam) is having a promotion until March 30 where you can get a free 2000 miles just for signing up for their frequent flyer program!
There is another 2000 available after your first flight with Alitalia then 2000 more for “transactions with Alitalia and its Partners in the ambit of the Millemiglia program.” From what I have seen this means that a 1,000 transfer from American Express Membership rewards to Millemiglia should work to activate the extra 2000 Welcome Bonus miles.
So to recap, sign up for MilleMiglia account, then transfer 1000 Membership Rewards Points to that new account, and get 5000 miles total! Or if you don’t have an Amex, then just take the 2000 miles for signing up.
Enjoy!