Thanks, I know of all the games you listed. I don't consider Bulfleet, Kings of Chaos or Torpia to be some of the bigger games in the market and Neopets and Gaia are kind of another market segment. But I will add Urban Rivals for sure.
Yes!!! Lords pwned KoC and even KhanWars

Renaissance Kingdoms: 3,183,633 PLAYERS SIGNED UP 1,360 PLAYERS ONLINE (you overvaluated it by at least 1-2 digits

)
Hattrick seems correct, they are huge.
Travian seems a bit too low to me.
Evony... I don't know, they did a quick jump for sure, but I don't know it will last in a long term (personally I perceive Travian much bigger a threat)
ERepublik so few users? I thought they would have more...
Relative data:
Samurai of Legend (2.5-3 times bigger than Lords)
The Wrestling Game (at least 3-5 times bigger than Lords)
Kingdom of Loathing (not sure, but at least 10 times bigger than Lords)
Farmersi (almost exact number of visitors that Lords, they are a game promoted/endorsed by one of the biggest Polish portals)