I've created an account just to reply to your statements. I got 2 x NS2 - both are now perma banned. The first one was banned after i transferred data from NS1 that was using MigSwitch/MigFlash for running (full airplane/offline play) and updating games (online method, using only full cert dumps), the 2nd one was banned recently after using the update method that i was using since i have MigFlash. I've copied full .xci dump with original certs to my sdcard (1 game on entire sdcard), inserted migflash (icon popup), ejected, updated game online, transferred to 2nd switch using local method and after 48h i got perma ban on my 2nd NS2 that was never used before for MigSwitch/MigFlash. Firmware is 1.2.3 - both NS2 had most recest OS version. It seems (my theory only) that some .xci dumps (even with certs etc.) are now flagged by Nintendo.