As a pure consumer, my exposure to small, indie RPGs has been almost entirely linked to G+. The only other social network I’m currently on is Facebook, for better and for worse. But my connections to gamers and gaming-related groups on Facebook are nearly non-existent. I would rather shove an ice pick under my fingernail than navigate another public (or private) RPG community/group/whatever on Facebook. I can’t imagine some of the Kickstarter groups (that share projects) could be any better.
But I also tend to cultivate my friends lists on any social media (or whatever) with a fine tooth comb. I don’t generally add friends/acquaintances willy-nilly, so the number of connections I have to any given vector (gaming, politics, food, whatever) is low.
TL;DR: What I’m trying to say is this: I’m wondering if consumers on G+ will find the shutdown more difficult than the game designers/project creators?