Google's making the same mistake that so many ISPs make, except they don't have the same excuses to fall back on. DSL and cable can experience congestion at such a level as to render some nodes near-unusable. But 1Gbps fiber (with likely 10Gbps or 40Gbps backbone)? There's no excuse. You have excess network, so start acting like it.
So you're experiencing congestion. Why not sell QoS to the people who really need their VoIP trunk or Minecraft server to be zippy? Cutting to the head of the line for a few bucks a month seems like something that would fly off the virtual shelves. If your bandwidth bills are too high, start selling packages for high-bandwidth users. On-net transfer is practically free, and off-net transfer for someone of Google's size can't be more than $0.012 per GB. Charge $0.02 per GB and make a small killing selling at reasonable rates. Heck, set your month caps at 2TB (XMission does 1TB on UTOPIA) and ding both Comcast and CenturyLink for their 250GB monthly caps. ISPs often leave this kind of money on the table for what I think most of us would consider reasonable add-on services.
And for those of you saying to get commercial connections, are you daft? Google doesn't offer business connections. (They keep saying Real Soon Now(TM), but I'll believe it when I see it.) Anyway, you're saying that if the Civic isn't meeting your needs, you should go buy a Porsche. What if what I really need is a Lexus? Too bad, so sad.
It's really hard to define a server anyway. If I run CrashPlan and let friends back up to my NAS, am I running a server? If I let my mom stream media from my Plex box, am I running a server? If I choose to seed the latest Ubuntu ISO on bitTorrent for any length of time, am I running a server? We can hope that Google is kind enough to look the other way if our usage is light enough, but that's always risky business.
For how much they've sold Google Fiber as being innovative, they sure are doing a lot to clamp down on novel uses. My how the tune has changed in just three years.