Ballinderry forward Aaron Devlin has had a 48-week ban for offensive comments on Twitter cut to eight weeks.
Devlin commented on a match official in the Derry club final with Slaughtneil.
However, the GAA has no specific rule regarding social media and on appeal the ban was reduced to the minimum penalty under the misconduct rule.
Ballinderry keeper Mickey Conlan was exonerated of a 48-week ban for abuse of a match umpire but Gareth McKinless' ban of the same duration was upheld.
McKinless, who was suspended for a category VI infraction against a match official, cannot play for either Ballinderry or the Derry county side in 2015.
Match officials were jostled following Slaughtneil's last-gasp win, which came after a controversial late goal in October's decider at Celtic Park.
Gerard Bradley kicked the ball towards goal and the umpire at the post signalled that it had crossed the line for a match-winning goal, a decision accepted by Campbell.
Tempers then flared at the re-start and in the melee following an ugly challenge, McKinless was sent off.
Devlin's ban was believed to be the first for the GAA relating to the use of social media.