Quote from stevenw:
be smart, as a customer, you should always support ourselves, in case you yourselve have some problem with IB later on.
Remove the modification/execution ratio will not do you any harm, but give great advantage to other customers who already post their reasons.
Don't be stupid. help and support customers ourselves!
If IB are doing this, then its not for fun or to piss off customers.
Its to keep costs down for all customers.
The exchanges in the past have wanted to penalise firms that have a high cancel/modify ratio. $1000 per instrument per day was what CME wanted to charge IB. And IB was going to pass this on to its customers.. But CME changed its mind i think. Doesnt mean they wont try it again...