Just a guess here, but freight forwarders and brokers and agents all simply contract
you out to someone else for the actual service
. They get a percent for making the deal happen.
So it would not be out of question for them to share web sites, photos, etc. and for them to have you contracting directly with the actual shipper, who in turn would pay them a commission.
You might also contact your insurer for their opinion, especially since they may have an interest in who is moving the boat and how. No doubt the contract has some provisions about liability, damage, and loss, all the more reason to check with your own insurer to see if that is proper.