dealing with Google's algorithm

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Let's say Google uses some kind of a sandbox for new sites. Yahoo & MSN don't seem to do that. Also, there are reports Google looks for abnormal link rate growth in order to detect spam. Sites with excessive inbound link growth seem to get banned.

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There are so many sites using the SERPS of Google, Yahoo & MSN (which don't have a sandbox) to get content, that inbound links are growing at an un-natural rate for almost everybody. The bigger a site, the quicker these spammy inbound links grow. Before a site even gets out of sandbox it has all of these spammy inbound links.

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I've spent months trying to figure out why my website got kicked. After taking a look at many other sites that got kicked, it seems they all have the same thing in common - there are many spamy sites scraping content from search engines (and the websites directly), and providing links to the site.

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Many of these spammy sites have many pages with the same listing, and almost always they use the same link text, so that adds to the problem.

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I know Google has said that no other webmaster can hurt your ranking but after studying this I truly believe these spammy sites are getting legit sites kicked in Google, between abnormal link growth, duplicate content and identical link texts.