99% of them are doing more than just not minding Melvin's issues, they're actively feeding off Melvin. Melvin is going to be (or is already) selling off what they have in stuff like FB, MSFT, AAPL, etc, and it's not the retail traders who are benefiting from this, it's the other parts of the investment banking system. Even the sales traders are going to be on the phone with Melvin going "Sell 200k AAPL? No bother."