jimmychuang - 4:17 pm on Jan 21, 2008 (gmt 0)

CM is the problem. During recent few months, the impressions of SS were more than CM. Some adgroups can not show ads in content match.

ROI was nice, but became worst this month.

First, YSM's traffic went down.

Second, Adsense's ecpm went down, and pay per click went down, I don't know the reason.

Anyway, I haven't create any profit this month.

Because of YSM's traffic down, I went to bid some 2 tier PPC programs. I tested four, three of them can't make any money. One of them remained good last month, but this month I lost money from it.
Because of the traffic sources changed, the quality and ammount of the traffic dropped down very very fast.......It just suddenly dropped down.

The PPC advertisement change very fast, just like any other traffic methods.

It's so sad.