11 is not that much. Out of my 442 submissions, only 35 reached the front page and had significant activity (>= 20 points and >= 10 comments). That's an 8% chance of reaching the front page without optimizing anything (apart from the interestingness of the submissions themselves).
Looking through your submissions, all of those are such interesting topics. It’s a shame there isn’t time and space for all the interesting topics that must be being submitted all the time.
