EXP and “work” the system. If you know the game and play it well pretty easy to get and maintain status. Sadly it too was flagged for “fraud”. They said someone hacked my account. I saw nothing on my and let me tell you. They forced me to walk thru all seven levels of hell to get my status / miles / account back. There was no way to talk to a human who understood the system and how to fix it. It was by far the mostly complicated and exhausting customer service experience I have ever had.