I always thought that SE recognize the fon color of invisible text and penalize it. In a shopping site I found that source code:

<!-- Keep from Here down --><font color="#fdfdfd">

<p>XXXX-XXXXX - Discount designer clothing, Discount branded clothing, Cheap sportswear, Cheap designer clothes
<br>We provide a huge range of mainly sportswear and some designer wear to the public at very cheap prices - we can undercut even the largest retailers.
<br>discount designer clothing, discount branded clothing, branded sportswear, mens branded fashion, kids clothes, designer ladies wear, discount clothing uk, cheap sportswear, cheap designer clothes, adidas clothing, nike clothing, timberland clothing, helly hansen clothing, calvin clein clothing, versace jeans</p>
<p>XXXXX <a href="default.asp"><font color="#fdfdfd">
discount designer clothing</font></a>, GROUP: We are based
near Bath in the west country of <a href="default2.htm"><font color="#fdfdfd">
discount branded clothing</font></a>,
England and have been in sportswear since 1989. We always carry an extensive range
of <a href="about.htm"><font color="#fdfdfd">
branded sportswear</font></a>, top branded sports and designer
wear (over 500 lines) making <a href="about2.htm"><font color="#fdfdfd">
mens branded fashion</font></a>, internet
sales an ideal extension to the business. Brands-U-Wear The internet retail <a href="help.htm"><font color="#fdfdfd">
clothes</font></a>, side of Colgan Sportswear Colgan Sportswear Buys sports and designer
wear from all over the world to sell to it's wholesale customer base in the UK,
Europe and <a href="shipping.htm"><font color="#fdfdfd">
designer ladies wear</font></a>, Scandinavia. It also
supplies party planners, market traders and retailers. Colco <a href="placeholder.htm"><font color="#fdfdfd">
clothing uk</font></a>, Unisport Ltd A franchisor supplying sportswear franchisees in
the <a href="about.htm"><font color="#fdfdfd">
cheap sportswear</font></a>, British Isles and Southern Ireland.
Colco Unisport (Bristol) Company owned <a href="default.asp"><font color="#fdfdfd">
cheap designer clothes</font></a>,
franchise that operates locally in the area around Bath and Bristol. It services
local agents and provides valuable direct information to keep Colgan buyers in
touch with what customers want.</p></font>

This site has no 2 position in MSN and Altavista. Why is it not penalized?