Generally speaking there is no bond for pilots Rated and current on Type. Some Rated guys have been bonded if they haven’t flown in 2 years on the actual aircraft or they are put on say the 787 and all of their time is on 777, even though it’s a common Rating. As the previous poster said, you need to weigh it up for yourself, if you’re planning to stay for 3years+, in reality it won’t effect you much.