I think they should keep the win, why? It is nothing personal because I actually like you guys, you are usually always cool when we play so I respect you to a certain extent, but because you continued to play the game like others already said until you were losing and knew it.
You joined a game hosted by HostingBuddy, you could easily have resisted this and stayed in AG and waited for them to return, then demand a Human host, if they then went on to report a win on TuS you would have a valid reason to complain about this game.
Already knowing they hosted with HostingBuddy and there is a VERY HIGH risk of having the wrong scheme, you decided to light anyway, my guess was "Ah they are not pro, we will beat them whatever scheme" which is nothing to be ashamed of, everyone (whether they care to admit it or not) likes easy wins sometimes

Why didn't you demand a Human host? Why did did you join HostingBuddy lol? Why did you light? Why did you continue to play for so long in the game without problems before finally complaining?
Maybe there should be a rule that unless you ask for a rematch within the 1st few turns the game should be valid because all players lit their bulb (accepting the scheme/map).