Usually, I receive responses to my post like "hey your answer does not work", or "thank you, but..." and it seems natural (as it is serious business for OPs).
Just recently I received a generous offer that I can get paypal (although I had not contributed much). Too good for me, and my family said no. But "what if"?
I could not find any particulars in Code of Conduct about the payment over our Q&As. My take is that this SE sites are meant for future readers, though.
Sorry for this ambiguity (and lack of language skill). To be short, what is possible response, without hurting someone apparently sincere person? I am hoping there is something written that it is not allowed.