Just an FYI for those who might look to book on 4Z at some point. When I was booking my trip to eSwatini/Mozambique, JFK-SHO in C was listed as 111.7k miles (with the last leg in economy). JFK-JNB was only 88k, and I'll just take a chapa to see some scenery on my way and get into Mbabane around the same time as I would have if I were flying. Since I booked using the Excursionist Perk, 4Z didn't add any extra mileage since it was still just 0 miles for my intermediary trip (VNX-JNB-LUN-ADD-HGA).