Well with no obvious legal pitfalls, Dexter saw no reason to not sign the contract. It would let him go and study the world first hand instead of just reading about it at a library. That and it looked to be a very lucrative deal. With just the price of the ticket he would get is 20,000. Although with him spending all this money on us, he must have some ulterior motives. However they didn't seem to be against him, so Dexter quietly signed his contract.