I got an email back from Zedge:
"We are aware of the problem and we are working to correct it. Please be patient, you will soon get access to Zedge on Google Play Store."
I'm having the same problem. I just wiped my m8 because it was crashing (wiping didn't actually fix it, something else did) and now I'm getting the same "not compatible" message. LAME.
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