I just started adding pages to Stumbleupon and I was successful with maybe 10 pages, I was impressed by the traffic and my little "trial test run", but when I went to add more pages it appears that they're not sticking. It looks like I hit some sort of spam filter or something. Has anyone cracked the algorithm and figured it out? Do I need to stumble more pages, add pages from other domains? Is there a time limit on how many pages you can add in a 24 hour period? I tried to find some sort of info / writeup on this, and all I could find was the official StumbleUpon documentation, which is very vague. If anyone has any info on this, it would be greatly appreciated.