no they won't... the money is used to develop our Professional products for enterprise customers.. the classic arduino will always be free. We've never build anything that would use licensing servers etc...
BTW Arduino is headquartered in Switzerland/Italy/Sweden/USA so... no UK there
Of course Arduino will be free, with optional/required registration. You will start by selling cheap labor leads to your professional customers. "Hot Arduino programmers in your area are waiting to meet you".
