I get that, which is exactly why I think a challenge is the fairest way. Give out temporary 3 month status, and see whether the customer will actually fly the airline. For example, why would someone in South America with Avianca *G be booking flights with LATAM without status with them? It's absurd. The challenge gives incentive without making the airline give away full on status to just anyone. It's worked well for the Big 3 in the US.