Finally manage to maintain minimum of 20 unique readers. Half thanks to Ping.SG and half thanks to Make Traffic. In order to get ads from Nuffnang, I need to have minimum of 20 unique readers. I have total 285 unique readers this week. That means I have maintain a minimum of 40 readers. I have minimum 25 unique readers and the highest is 72 unique readers. When can I get my ads? 
I have been announcing my posts in Twitter.
Popularity: 5% [?]
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[...] finally got my ads from Nuffnang. Thank ya. Waiting for this for so long. Like years? Thanks to Ping.SG and WordPress Version 2.3.3, for the tags function. I’m using their Tags function. And [...]
My food blog had 100 over unique visitors but still no ads.
Bet they’ll say it’s advertisers decision.
Replied:
100 over unique readers!!! Wow. Maybe you do a screenshot of the reads and post it up on your post. Maybe it will alert Nuffnang about it.