However, that effect does not extend to many kinds of gifts. Which is why I receive some stuffed animal or similar every 10th donation (I politely refuse them,

However, that effect does not extend to many kinds of gifts. Which is why I receive some stuffed animal or similar every 10th donation (I politely refuse them, not to add to the waste in the world). People with rare blood could be gifted things like emergency taxi rides without adverse consequences and it's just bureaucracy, not science, that is in the way.