How many of you use google custom search and how much earning it gives you?

Can someone share if he have got good click earnings form Google custom search? We are planning to use it on our site, but some people seem to suggest it should not be used and CTR is very low?

 

I test it for almost 2 weeks on a blog with 50-100 visits/day. 0 results for me.

 

I did use it, the result is not that good because it is hard to get the visitor who use the search and then click on the adsense ads on the search page. The CTR is very low. However, if the search play as feature for the visitor to use, then it can be a good consideration. Also, sometimes might have some surprise