Earlier quoted context omitted.
And your company will be okay with buying, say, a 500 USD sticker?
Yes. This is what people don't understand. I call it "gratitude-ware". You give me an invoice, and I will pay you 500$ for a pixel on a page.
So, can I do that? Add a note under the donation page that says, "if you need an invoice for your donation, email us here"?