So the timer only refers to when you can click the supporting banners again?
I was worried that it meant my CPs would disappear (expire) altogether if I did not spend them fast enough, like purchased cell phone time. Which did not really make sense in light of the increased CP cost for items comment.
Okay, here's how I interpret it. Please correct if incorrect:
White: You have clicked all the support banners within the last 24 hrs. Don't bother checking again now. Wait until this becomes green.
Green: Green means go! 24 hrs have elapsed since you clicked a banner for CP. You can click again. Or you haven't clicked *all* the banners within 24 hrs. Go back and finish up.
Red: Slacker! You have been eligible to click support banners for more than 24 hrs. Therefore, you have missed a window to maximize your CP collection. But wait! There's more! If you act now, you can resume your support of SWC and continue getting CPs. The sooner you act, the sooner you can hop back on the optimum CP collecting/SWC supporting track!
(The first 2 seem to match my experience. Haven't had a RED counter yet so not sure.)