That's an awesome way to reward people! I've gotten offers for money, but actually getting to money to me is more of a hassle than it's worth, so I just decline.
Just because soneone “donates” money, it doesn’t mean that you don’t have to pay taxes.
So in general it only pays off if it is above a threshold. If a company offers to donate 2000€, I would find a way to make it work. But if it’s just a one off donation of 10€, I’d rather not bother my accountant with it.
It's interesting that we have much simpler payment methods available in the EU, but apparently EU people don't like to pay for things.