here the code why you're need to wait before able to posting again
Wait Timeswaittime = 360;
if(activity >= 15)
waittime = (int)(90 - activity);
if(activity >= 60)
waittime=(int)(34.7586 - (0.0793103 * activity));
if(activity >= 100)
waittime = max((int)(14-(activity/50)), 4);
or in other word, you have to make 15 post to pass 6 minutes wait time,..right ?