Looks like Turkish Airlines is now selective to whom is eligible for a straight challenge or whom should do a flight prior to a challenge itself - here is a response received after applying this week: "Thank you for choosing Miles&Smiles, the frequent flyer program which offers a whole world of benefits. So that we can fulfill your request to match your membership status to Elite and offer you a truly special flight experience, you should have an at least one Turkish Airlines filght that have been recorded to your Miles&Smiles account. You can reapply after your flights are completed and registered to your account. We look forward to bringing you all the benefits that Miles&Smiles has to offer. Sincerely Yours," Make it make sense!