I was never able to obtain any tokens or packs from offers since I started playing this game last year (2015). This year (2016), I had to deal with excessive injuries and so on with limited resources only. I did use some bought tokens to heal some injuries but I can't keep on buying tokens to turn into red packs. I was forced to sell many players and buy others because I had no other choice. At some point, I could not even buy other players because the tokens were used up.
Maybe now some users will see how it is difficult (and also annoying) to play this game as it is when you are in the same situation as me.