Same thing others are mentioning, a pool forked from the blockchain for 300 blocks. I don't know the details, but I mentioned this recently with why I wouldn't mine a coin with short block time. It's because the network is flooded with absurd amount of orphans. One of those nodes/pools was obviously unable to recover for it, and either mined 300 orphaned blocks in a row, or something along those lines. Maybe it was just for a span of 300 blocks and not that the pool found 300 orphan blocks. Either way, I think WDC is flawed.


I did want to jump on the bandwagon but that really strays me away from it.