Adsense for Search vs Google Custom Search

One of the changes we made last week was to replace AdSense for Search by Google Custom Search for Google search result integration.

According to the feedbacks we received, our search result pages had been blocked by some corporations due to some unknown reasons. We discovered that the reason may due to the integration of "AdSense for Search" to search results Once we changed the integration to Google Custom Search, this blockage disappeared. We still don't know why.

There are some differences between Search Engine using Adsense for Search and Custom Search Engine:

Powered by Google. A search engine using Adsense for Search can use this term while a Google custom search engine can’t . The term Google Custom Search must be used unless its result pages were hosted by Google.

AdSense Ad Channels. A search engine using Adsense for Search can have many channels. We have not checked the limit but we believe it’s about 200. Google Custom search engine has only one channel.

Number of Search Sites: A search engine using Adsense for Search can search on either a single site or entire web but Google Custom Search has no limit on number of sites it can include to search.

There are also other differences but we don't mention here since they do not apply to SearchTheWeb2.com.