There are no plans for closed servers.
Not financially viable for a primarily singleplayer game, especially not for one that doesn’t rely on microtransactions to make profits.
Alas, you vastly overestimate how many players actually care about multiplayer in ARPGs, roughly 10% of the audience. It’s like saying Skyrim needs secure servers cause it’s 2017. As for safe gaming…I don’t know about your room, but when I play games singleplayer in my office, it feels pretty safe.
When you buy a copy of Grim Dawn, you could play it 2 hours or 1000 hours, from a business perspective it makes very little difference to us. If we had closed servers, now the player who plays for 1000 hours is considerably more expensive for us, and will continue to be for as long as they play.
At that point, introducing microtransactions seems like a no-brainer to off-set those costs.
I think we’ll be sticking to our (already successful) plans.