Finally mt card had some movements now, they are not dead. Today the mt card offical site released the new hardware v2.2 which support NAND-emulate 9.2.0-20, support DEVMENU. At first, i though it says mt card can support 184.108.40.206 3ds directly, a little disappoint, but still a good news to mt card users.
Source from : http://www.[site removed because of borderline spam behavior]/15-mt-card-playi ... pport.html
MT card Software Ver2.2 released
The update brings the latest virtual system function. MT card will support DEVMENU after update. To update to Ver2.2, just transfer the latest launcher.dat to the SD card and replace the old one. Hardware version remains the same(Ver 2.0).
1. For NAND-emulate. Support the latest version 9.2.0-20. You can enter Eshop and play the latest games after update. For more details, please read the provided instruction with the update package.
2. Support DEVMENU. When you enter DEVMENU menu, you can install CIA files from SD card, and you can also enter the game via DEVMENU