Because what you told us is exactly "targeted and restricted: "The cahrity donated to help a private person through facebook and go fund me."

You told us about a specific campaign; if I am responding as a donor to a targeted campaign to raise funds for that person to get a service dog, that is me responding for a Targeted and restricted purpose, by definition. I would be donating to your charity, for only this one purpose, and then you use the funds raised in support of that one purpose.