This just comes with Game Progress. The More you play, the more you'll have. A "Stoken" is when you get someone stoked by preforming a nice trick in front of them. A combo of 10,000 seems to do the trick everytime, and will get you a stoken for everybody who saw you during the entire combo. The longer you keep it, and the more points it's worth, the more people interested. Should come anywhere from 6-12 hours into the game. Remember, Buying Special Tricks will spend Stokens, so try not to buy any until you have the 1000.