The campaign seems to have done more harm to Nintendo, including the prospects of further localizations of Tomodachi Life and the reception of that title, than good.
It's saddening as the context is not explained and the headlines are aggressive:
I know quite a few folks at Nintendo that are gay and deeply enjoy working at Nintendo. The portrayal of Nintendo's stance on LGBT communities in the media could not be farther from the truth.
Yeah it's pretty crazy, It seems Nintendo just wants to remain neutral in this whole debate, which is fine - as they say "[they] never intended to make any social commentary with the game". But it seems some media outlets want to take the position of neutral as 'anti-gay' or 'if you're not with us you're against us'. Even that BBC headline is pretty sensationalist: "Nintendo says 'No' to gay game characters", um no they didn't, everything Nintendo says is written in their own article and it's pretty clear they never said 'no'.
Nintendo do seem to be listening and have never said they won't allow gay characters in any future iteration of the game, it just seems unlikely to be patched into this version.