GG, Mack! Dave indicated he was ready to end the game when he sent the most recent turn, Cairo is almost dead, and I've been ready to concede for a little while now.
I think I'll lurk the next game. I never minded playing my turns, which largely consisted of playing in a sandbox, repeatedly crashing my economy, and watching the world burn through Floating Eyes, but my empire was inert and did little more than occupy space, and I had minimal ambition or motivation to do much else, which doesn't bode well for sustaining interest through another PBEM at this time.