I co run a blackhat voucher/coupon site. Google has been going nuts with it the past week or so. I could really use some advice from experienced members as to what is going on. This image shows what's been happening to my google traffic. I have been building powerful blackhat links at a steady and consistent rate of increase. The peaks of the graph show when I reached page 1 for a lot of my subpage keywords. This happened twice, for a period of 2 days. Then, nothing. The site comes up number 1 for its name and is still indexed so I don't suspect a ban or penalty. Does anyone else have experience of this happening to their sites? Would love to hear from you - or anyone who can give advice. Thanks!