So surprisingly not a grindfest as usual, just daily mission you need to clear to get a token. You only need to clear 13 missions out of 15 missions available.
First mission for 12th March is also simple, 'just' win 5 match as top 10 exp earned, which is suspiciously easy. No doubt latter missions will be something hard or taking patience.
But anyway, as a casual player I really interested now and might try it. The tank itself seems not that special but hey, baby Pershing. Hopefully i could get at least 5 to 7 free tokens.