It serves Trump for his j6 insurrectionists and their families to believe he’ll pardon them all. His supporters (j6 and other extremists) serve Trump by continually reassuring each other that the pardons will definitely happen day 1.
Trump supporters are surely telling each other that they have it from ‘reliable sources’ (their imaginations) that Trump will pardon everyone that’s faithful. The day of forgiveness is near and all they have to do is have faith and do good works (spread the faith, give money) and their redemption shall come.