That's just the closest tag you can pick for this type of games, it's not idle, but it requires minimal effort to play it. And since I'm getting a lot of traffic from it and none complied since then, I guess this is in a way what players on #idle are looking for too. I get that not everyone will be happy with it, so sorry for that.
I also see every active incremental game uses this tag, so I went this way too.