I was curious if any of you make a good portion of profits from your search code using Google Search. Honestly, I only have it on my main page, but I'm thinking about putting the convenience on most of my pages.
I make very little money from Google search. I put it on every page and it accounts for 1.5% of my adsense earnings. The CTR and the eCPM are the same as the rest of my site if anyone uses the search, but very few visitors use it. I don't think it's worth the real estate...but I've been too lazy to remove it.
I'm using the CSE version and haven't seen a reason to switch to the new AdSense version. I'm only using it on my main site and have the results restricted to those belonging to that site. Overall, it contributes around 15% of total earnings. I'd still use it if it didn't earn anything because I consider it a service to my visitors.
Eventually I may try the AdSense version on other sites. I just haven't found the time to give it a try.
The reason to put search on your website is to help your readers find more pages on your website. The longer they stay and read more articles the more is your stickiness, which in the long term, creates more value.