Flypool/Bitfly Miner Centralization

“t1S4ydQEgzgLuWWvHiRBfcqW7AFE3RssVHy” (BITMAIN’s ASIC Private Pool suspect) is losing most of its hashrate, and Flypool is back to their over 51% hashrate.

I checked if “t1S4ydQEgzgLuWWvHiRBfcqW7AFE3RssVHy” was hiding its hashrate in other pools, but there’s nothing to be found.

https://zcash.flypool.org/miners/t1S4ydQEgzgLuWWvHiRBfcqW7AFE3RssVHy

If they are pool-mining under a different address, some pool’s hashrate would be skyrocketing right now. Clearly that’s not the case.

“t1S4ydQEgzgLuWWvHiRBfcqW7AFE3RssVHy” once had almost 50M sol/s of hashrate (10% of the network). Where did it go? It couldn’t possibly go to other mining network. ZenCash, the second largest equihash network’s hashrate is only about 60M sol/s.

Did BITMAIN shut down their pool? Did all of their ASIC miners suddenly break?

Any thoughts?