Lynx is just a company trying to market IB in Europe. You would be far better of doing business directly with IB. But apparantly Lynx has leverage on you. I would run away as fast as possible.
having said that: opening an account with TOS is easy for Europeans. Just look it up on TD Ameritrade’s site. If you fund it enough and have sufficient trade volume you can bargain a rate of 0.65 per contract. That’s what I do. BTW full disclosure: I am with IB as well.
european brokers are just too expensive.