I would donate, depending on the reason the person needs money, how well I knew them, and how much disposable income I have at the moment. If I have extra money and like them, then why not? Hobby is expensive and a little help is always appreciated.
I try to keep the mind of “there is no harm in asking” for GFM and the like. As someone said earlier, many people set GFMs up specifically because other people want to donate and that is an easy platform to receive money through. An artist I knew put up one for their cat. It had needed a couple thousand dollars worth of vet bills, which the owner was able to pay but it was a big blow to their finances. I threw a few dollars their way.
Conversely, there was an owner whose mare had unexpected complications during partition. They lost the filly but the mare had to undergo a lot of vet treatment. Owner had a decent following on IG and documented the entire thing. Many people donated to the GFM. I didn’t, because 1. I did not care for Owner (or follow them) and 2. I felt Owner was very irresponsible about the entire debacle. Sometime during the event, I believe while the mare was still hospitalized, the owner mentioned that they planned to rebreed mare and that opened up a nasty can of worms. Many people were upset that Owner would try breed again given they hadn’t had the money to pay the costs incurred the first time.