(I apologize if anyone else has already mentioned this).
Maybe part of the reason the fees were implemented was for margin calculations. If I have a position in an illiquid contract, placing a bid or offer (to narrow the spread, with a low risk of getting hit, since these options wouldn't trade much anyway) could drastically alter the market equity value.
Implementing a cancel fee would help remedy this by discouraging baiting.
Maybe part of the reason the fees were implemented was for margin calculations. If I have a position in an illiquid contract, placing a bid or offer (to narrow the spread, with a low risk of getting hit, since these options wouldn't trade much anyway) could drastically alter the market equity value.
Implementing a cancel fee would help remedy this by discouraging baiting.