What part of "parameters don't stay constant do you guys not get?"

When I bought them at 10000 USD, profitability/miner was about 260000 USD

One month later, difficulty increase, and profitability/miner was about 60000 USD

Ages later, once innosilicon had enough mining with my miners and sent them to me, difficulty increase, and profitability/miner was about 6000 USD

Innosilicon had also a few surprises for me (hashboards burn) some miners not working etc. etc.

Today, you can see the profitablity yourself

BITMAIN are now flooding the S9 just like they did with the D3 cuz the new Halong miner will ship soon

ASIC is destroyed

Ethereum will switch to POS

GPU Destroyed

Save yourselves and buy godamn crypto and let the ASIC producers lose money and be left holding worthless hardware for once

Can't say no one warned you guys