In a short announcement over their forums, Orbx has indicated that due to technical difficulties, their updates and new releases would not be available on the Microsoft Flight Simulator Marketplace until at least September 1st, 2020. This will not affect the already available sceneries, which are safe to purchase there. Currently, this means that the latest updates to Orbx London City Airport and Landmarks London City are not available to customers who purchased these on the Marketplace. Purchase made through Orbx Direct are still available in MSFS right on purchase.
Users should also be aware that Orbx has a 40% off cross platform policy for owners of a scenery on another simulator. This means that for example if you already own the Hollywood Burbank Airport scenery for P3D, you are automatically entitled to a 40% discount on the MSFS version. This discount only applies on Orbx Central or Direct and not on the MSFS Marketplace so long time customers may prefer purchasing their products at Orbx.
[Title Updated 0720Z]