A cursory reading of the decision (PDF), and most reporting on it do suggest that it allows the president to sell pardons. Clarity that it does not can be found in a footnote, which reads in part:

JUSTICE BARRETT disagrees, arguing that in a bribery prosecution, for instance, excluding “any mention” of the official act associated with the bribe “would hamstring the prosecution.” … But of course the prosecutor may point to the public record to show the fact that the President performed the official act. And the prosecutor may admit evidence of what the President allegedly demanded, received, accepted, or agreed to receive or accept in return for being influenced in the performance of the act… What the prosecutor may not do,however, is admit testimony or private records of the President or his advisers probing the official act itself.