And frankly from their perspective, your response does kind of read like extortion, e.g. "shut up or pay me". The thread already indicated that this was fixed and waiting for the next release [1] so I don't see how your response is appropriate to the asking when that was planned.
I can certainly understand why this guy is frustrated as an open source maintainer, but snapping like this doesn't help anything.
[1] https://github.com/mitmproxy/mitmproxy/issues/6051#issuecomm...