I’ve seen people mention a trick for earning extra XP with KLM by booking a trip that starts in Antwerp but then skipping the initial train segment and boarding the flight directly from Amsterdam instead.
KLM’s website mentions you should keep your stamped train ticket as proof that you completed the first part of the journey. I’m wondering if this is actually required, or if it’s fine to just begin the trip from Amsterdam even though the ticket was booked from Antwerp without causing any issues.