I started to realize that when I was just a new white card holder that I never was offered any alliances by anyone. When I became a yellow card holder I still wasn't really receiving much offers for anyone. However, now that I'm at dark green I realize more peope are throwing out offers. I find it interesting how maybe the higher your color the more people are willing to work with you. I guess maybe they assume that you'll be a good ally and know how to play the game if you have been on tengaged for awhile. I also think that when it comes to "Castings" the people with the higher colors usually go over the people with the lower colors when nominated. So I guess the higher colors try to stick together as much as possible so that if they're nominated they could be nominated against someone who is considered an equal threat.
Regardless, I love the colors. I think its cute and I can't wait to make it to my next color which I believe is blue. My favorite color is purple and it looks like I have a little ways to go before I get there ;)
http://www.tengaged.com/blog/Daren/445237/mrt