I don’t know about Australia, but here in the UK I have experience of this. I volunteer for a small charity. We had lawyers act for us for minimal cost to us. But of course they had costs they would normally have charged for time etc. When we won our case we were awarded costs and the lawyers were able to claim normal costs for the things they were willing to do for us for a fraction of normal cost.
I think the point is that just because you will help what you believe is a good cause doesn’t mean that you don’t actually have reasonable costs. And while you wouldn’t charge them to someone you support, if the legal system thinks an award of costs is appropriate, you are owed for your time.
Sadly in this case it has gone against Sal this time.