How many doorway pages can I submit to a generic Search Engine without be considered spam?
More precisely, suppose we have 200 keywords describing a particular web service (among other services under the same domain). If I build 200 doorway pages for Altavista, 200 for Infoseek, 200 for Excite, etc... all linking to the same URL of the main root of that web service, is it considered spam by some (or all) search engine?