I found something strange:
I have two accounts, A for my trading, B for collective2 autotrading.
When I create an MES order on A and do not transmit but instead 'Check margin impact' the commission is $0.47. When I do the same on account B the commission is $1.07 ??
Kudos to IB and def for helping to resolve this mystery.
IB did NOT raise their commissions!
Fact is that a company called C2 Gateway acts as an introducing broker and taking 60 cents per MES trade, which is just ridiculous.