What is in that "promise"? Surely not salvation, but a promise is a promise. When the church next has baptism services, the promise will be fulfilled. They will then be a Full Fledged Member of a Baptist Church, which church hopefully believes in the Lord Jesus Christ for their salvation, and not by applying the Works of the Hands of man to make sure.
You didn't read what I was responding to:
He claimed that the candidate for membership when presented to the church for membership with the "Promise of Baptism" has full membership priviledges from that moment and doesn't need to be baptized. It's all done under the principle of inclusion rather than exclusion.