User blog comment:Dragonjet/Ban Safety/@comment-128.199.254.26-20160115045206/@comment-1820055-20160115072415

Multiple accounts in one computer is alright, as long as you're playing on a different browser/profile (separate cache/cookies) (unless you're playing via API link but who plays via API link nowadays). In devs eyes, that wouldn't be any different from you and your neighbor (on the same ISP) playing. They don't ban neighbors.

But if you were to cause an offense (BOT/Macro/Cheat Tool), only your account will get banned, and not the other player's. EXCEPT if this tool involves a computer-wide mechanism where both accounts are affected (e.g. on top of my head a global speedhack or something). Then both will possibly be banned.

If there's only one account offender, like that account's api_token is used for an artificial APi calling tool, only that account is in danger.

HOWEVER, we have seen bans throughout the ages out of nowhere, for even innocent people, and these might be misfires from the banhammer, you can figure everything else out. Who would be the most possible victims of misfires but the one closest to the offenders.

All of these without guarantee.

About DMM vs Devs, we know that DMM is co-producer, but in terms of the game technicalities and content, it is most likely only Kadokawa Games. We can guess that DMM is only involved in the business side, as suggested by old interactions with the devs themselves, where they redirect DMM technical questions to DMM, and they are not directly involved with each other in tech. We could also assume Kadokawa Games also host the servers.