From what I understand most of the brokers commission is in the first year. Not sure of why they would have allowed this even a second time. Sounds fair to me what they are saying, nothing for nothing and all that, but maybe ask to see the terms and conditions of this offer, is there any mention of it in there. Might be no harm asking someone else in the industry how this works, I'll send you a pm of my brokers details if you like, nice guy and quite helpful.