If it doesn't hamper your keyboard usage, then I don't see why not keep it.
I'd personally recommend forgetting about Razer keyboards altogether and looking at other brands that offer better products at a lower cost. Corsair K70's have been dropping in price for a while now.
My first blackwidow had a backspace key that would never fully depress and felt very scratchy. I tried doing my homework on it (I was in college when they first came out), and in 5 minutes, gave up and returned the thing. The second one I received had a space bar that came with a bent stabilizer bar underneath, meaning it could never fully depress, and actually ended up getting stuck at the bottom until I pried it off with a popsicle stick. Needless to say, it went back. The third one failed to light up.
I gave up all hope of having a decent Razer keyboard, and kept using my $45 CMStorm Quickfire Rapid Pro with Cherry MX Blues. I've had it for 5.5 years now, still going strong. The keycaps are starting to show wear and tear, but mechanically, its function is still like new, no failing switches, no failing keys, no failing lights.