This does happen in other sports, though it will depend on whether an appeal is a review or a re-hearing. If the former (and I don't know but it feels these appeals are reviews rather than re-hearings, otherwise it wouldn't just be the suspension quashed) it is often dealt with by way of a deposit that can be forfeited for frivolous appeals, if the latter it can be a forfeit of deposit or increase in sanction.I have no evidence to back this up, but I do think that increasing a suspension for 'frivalous appeal' should also be a key part of the appeals procedure, to prevent everyone doing it, but I haven't seen anything like this done for a few years.
Assuming a similar process that applies to Steps 5 to 7 applies in the professional game, it looks like a review where only the appeal fee is forfeited, though I would hope in the professional game the appeal fee is significantly higher!

