A few have posted here before about how Yahoo will - for some domains - only index the main page and not the rest.

For my older domains with lots of static html pages, almost all of them have only the index page indexed. The other pages were indexed at one time but no more.

For newer domains, all pages are indexed quickly and easily.

So now I wonder:

Does Yahoo take out pages that have not been updated for a long time?

Does Yahoo take out pages from sites that are affilliate sites?

How should I build pages from now on so that they stay in Yahoo?

What about datafeeds? Will the pages created from them stay in Yahoo?

Any input would be great.