The last diff adjustment actually decreased a bit diff, now at 5.08471926 as opposed to 5.48902389 earlier, which is good news for all the miners!
This coin killed instamining quickly. The problem with WDC, I think, is too many instaminings at low diff, so when it hits the exchanges, big dumps from those who grabbed at low diff, thus killing the great WDC, sad
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Also I think WDC got onto an exchange too quickly, it wasn't allowed to grow enough love with the community yet. Once WDC appeared on bter, everyone tossed it like loveless parents.