I will point out here that Stratum (the protocol for communication between pools and mining equipment) does not support overt or covert ASICBoost.
Mining Profitability and ASICBoost
Jimmy Song

I could be wrong, but I believe this statement is incorrect and has been proven false several times. Reddit user bip37 posted the exact Stratum command needed by the S7 to enable ASICBOOST only for Antpool.

Show your support

Clapping shows how much you appreciated hagrin’s story.