So ... I gotta ask: why did this happen?
Height Miner Time Size
402864 Unknown 17 seconds ago 934.6 kB
402863 Kano CKPool 4 minutes ago 983.1 kB
402862 DiscusFish / F2Pool 5 minutes ago 266.0 bytes
402861 BTCC 6 minutes ago 623.4 kB
402860 AntPool 17 minutes ago 488.3 kB
402859 KNCMiner 25 minutes ago 290.5 kB
402858 DiscusFish / F2Pool 29 minutes ago 407.9 kB
402857 Bitfury 33 minutes ago 230.5 kB
402856 AntPool 33 minutes ago 223.0 bytes
402855 AntPool 35 minutes ago 667.7 kB
You see what happened is BTCC gets a 623kB block ... and 2 seconds later F2Pool gets an EMPTY block.
BUT, 69s later we got a block at kano.is ... 983kB
Yeah maybe there's a reason for smaller blocks after a block change ... but EMPTY?
Because they're still SPV mining and will continue to do so just like every other Chinese pool.