Game modes

This might be an idiotic question but im just curious as to what each spoils contain and what each game mode does, if i could be redirected to a section that explains all of these that would be great. Thanks
Conquer Club, a free online multiplayer variation of a popular world domination board game.
http://www.tools.conquerclub.com/forum/
http://www.tools.conquerclub.com/forum/viewtopic.php?f=6&t=124544
Instructions, Gameplay options wrote:Spoils
Escalating groups are worth 4,6,8,10,12,15,20... (i.e. the first group of spoils turned in by any player is worth 4 troops, the second group is worth 6, etc.)
Flat Rate groups are worth 4 for red, 6 for green, 8 for blue and 10 for mixed.
Nuclear groups are not worth any troops. Instead, each region in the group is nuked to a single neutral troop (even if you own it!).