You only need to restore a clean eMMC backup if you ran CFW/homebrew. If you've already restored a clean backup or never run CFW/homebrew, you don't need to restore a clean eMMC backup every time before going online.I'm thinking of playing online from official cartridges on sysNAND and pirating + CFW on emuNAND (will also stay offline w/ emuNAND w/ 90NS + Incognito + airplane mode). I've been advised multiple times that this is perfectly fine as long as I keep these activities separated this way.
However, on the Ban Info mega-thread, it was advised to restore NAND every time before going online to avoid a ban. Does this imply that it's not entirely safe to use the NANDs concurrently this way?