I was trying to find out if purging virus counters took them off Virus Breeding Ground as well (it seems they do) as everything else, when I came across an interesting question:
Suppose you have Hivemind with 1 counter and incubator with 3. If, for some reason, you took a bunch of sanity loss in a recent Arkham Horror run, and decided to use incubator and put those counters on, say, a Darwin, which of the following would happen?
a) 3 counters go to Darwin (all from incubator).
b) 4 counters go to Darwin (3 from incubator and the 1 from hivemind).
c) either 3 or 4 depending on whether you want that counter to "be spent as if on" Incubator.
I hear you asking..."Why not just put the counters on Hivemind like anyone with brains?"
To which I would reply, "That's not the point of the question, and clearly you didn't see the disclaimer about recent loss of sanity above."