When to drop friends
You'll find it easier to find the robots in abandoned towns, so I'd keep them for a while
Forum Discussion
It used to matter if your neighbors were active because they used to provide additional event currency but now they really don't. If an event gives you the option to do something besides tapping like dropping presents (Christmas event), gremlins(Halloween event), or something else that provides additional currency i'd trade out neighbors.....otherwise, don't worry about it
