If the 1001 block window reaches 95% all block with version<3 will be rejected and become orphaned.
How could we have reached 95% with f2pool and antpool mining version 2 blocks?
This all seems a bit weird?!?
They were both mining V3 blocks but didn't completely ignore V2 blocks after 95% ...
then f2pool built on a V2 block and as many know the 6 block fork happened.
AntPool sorted out their pool and moved off the 'v2 fork' and found a 'v3 fork' block and everything sorted itself out some time after that when the 'v3 fork' got ahead of the 'v2 fork'
I've no idea if or when f2pool stopped accepting V2 blocks
Based on the latest post for F2Pool, they haven't stopped accepting v2 blocks. Hell, they will accept ANY block even if it's completely invalid, because they are continuing to mine using an SPV client.
Hint: If anybody finds out how they're listening (most likely they simply have a stratum client connected to other pools), they can broadcast a completely fake block header to the chinese pool's SPV listeners and they will begin trying to mine on this "new block" even though it doesn't even exist.