robert bowling said on twitter :
@blake4x4 yes, you get 1 prestige token per game (regardless of how many times you've prestiged), but will get 1 token per prestige in #MW3

Red_Tiger wrote So many people don't get how this works lol

Well, it's a common misconception, I can see how this can get confusing, I didn't understand it at first, but it's not really all that hard to comprehend, but I can still see how this can cause confusion.

Westicles wrote

TTG_maarky_laad wrote i dont get this tell me how much get

cod4 : 10th

5 : 11th

6 : 10

7 : 3rd

You only get one, sadly. It doesn't matter how many times you prestiged, if you prestiged a to max level in every game you would have a total of 45 tokens. See what I mean?

yep you only get 1 soo said

I am the highest prestige in all the games i wonder how much double xp you get!

13th wrote I am the highest prestige in all the games i wonder how much double xp you get!

I believe you get 2 days? I don't know the exact time, I will look around, and I'll edit my post if I find anything.