lxp doesn't care how much you donate. The reason why he is asking for a donation is that he spent a lot of his own time to create these drivers for the neopwn project, for which he was promised money. However since neopwn has basically fallen off the face of the planet he is asking for a small donation to go towards the time and effort he put in.

If it wasn't for lxp we wouldn't even have monitor mode, let alone packet injection.

More info here