Calculating the amount of shill posts and spam and ddos attack is a hobby. Stick around long enough, browse other boards and image board sites and you can figure out who is behind it. Time of day is a big factor, images are recycled and so it is good to remember all you see. They are not purchasing the best attacks of late, it is a sign of giving up and/or resources running low. Since the posts follow a pattern it actually backfires the intent, which is to create a narrative of natural characteristics. I dare say the amount of time and resources spent to thwart an image board is 100% wasted at the current level of spam. Not posting anything would have decreased the momentum and size of the movement leading to drop off out of disinterest and thus been more effective than anything else. My favorite spam is the old testament spam as if any on an image board can be influenced– it is so stupid it is funny. Learn to enjoy it, and never get mad about it, it is likely some third world persons job and they likely have no idea what they are doing other than trying to make some money sitting on their ass at home or in a Eastern European or Israeli internet cafe.