After the analysis of old and new receptions of optimization in Yahoo!, and first tens sites also, it is possible to note the following facts which are worthy:

          Maintenance of open indexing by means of Robots.txt is the wise decision. A lot of our old client sites occupy high position in a rating without use of monthly adjustment of a site, or just by spending only its thin adjustment. In my opinion, content updating does not play a considerable role in Yahoo! algorithms at present.

          In most cases the sites which are at the top of Yahoo! rating, are on the verge of being qualified like spam. Many of them have reached rating tops because Yahoo! antispam filters are slightly worse, than Google filters. I believe that Yahoo! will improve this fact In the nearest future, and I'll be very surprised to know that the situation remains invariable.

          The most general statement discussed at forums, is that it is necessary to get to Yahoo! catalogue only, and this will instantly lead to the increasing of your rating in the search system itself. Unfortunately, we have not noticed how the annual payment in 299$ for site placing in the catalogue considerably increased its rating for a short time interval. It was said there that "I am deeply assured that placing of your site in Yahoo! catalogue allows to receive the external reference possessing high reputation. It will bring quite good dividends as many search systems appreciate external references (that consider them)".

          Yahoo Search Submit published the message on February, 2007, in which it criticized sharply much more exclusive position of sites which registrations were paid compared with other sites. Despite the appeared negative feedback, it is still possible to marc out a number of positive possibilities as the results of paid indexation. First, I read rather interesting article in July in which it was said that one of sites had been closed by Yahoo! search system. The site owner paid a certain payment following which the site was indexed again ("Forbidden Yahoo?"). Secondly, Search Submit surely guarantees that your site will be indexed. Besides, Yahoo! Search Submit Pro service allows to introduce for consideration pages with it's own headings and description tags. Thus, pages which cannot be indexed normally if the whole site is introduced under consideration, are introduced too.