Yes these go bad.
I purchased some that were bad.
I had some set in my camping gear box for a month or two and were bad.
For $0.88 I thought they would be a bargain to just have and make starting a camp fire a breeze, i was wrong. It took me longer to start these babys than it did splintered redwood.
For ease camping I use firepaste now or whatever I have leftover from my fire starting tests (about every fire starting product on the market + some you don't know about! writing website now)
Cophlans makes a mini-log w/built on waterproof match they burn ~11 minutes I highly suggest these!