Kmanrox,
Players like Overture and other big reputable ppc engines are supposed to have proper protection from click bots such as any hit from the same IP in a 3 hour period or so is only counted as a single hit.
Overture has this
[FindWhat did have some problems a while back, don't know if it still has some problems or not]
Numbers 1-3 get major hits because they show up at the top and surfers like clicking the top 3's, seemingly even before reading enticing descriptions that will get them to click on links lower down and 1-10 are the general links listed on affiliate sites and that's why numbers up to and including number 10 get much more traffic than numbers greater than 10 that have much less web exposure.
Later, RIPP
------------------
<b><font color="orange">Mo MoneY</font> - <font color="#80ff80">GREAT Commisions, NEVER LATE & Customers Yours For LIFE</font></b>
<font color="white">Sex Toy Specialists</font>
<A HREF="http://www.sextoysinternational.com/join/index.shtml" target="sextoys"><font color="yellow">Sex Toys International Affiliate Program</font></a>
<font color="white">Adult DVD & Video Specialists</font>
<A HREF="http://1-adult-dvd-xxx-sex-videos.com/webmasters.shtml" target="1adult"><font color="yellow">#1 Adult DVD & XXX Sex Videos Store Affiliate Program</font></a>
<b><font color="#ff0099">NEW</font></b> - <font color="white">UNIQUE & HIGH CONVERTING</font>
<A href="http://protect.1adultorgy.com" target="protect"><font color="aqua">Hide & Lock Files & Favourites or Even Shred Data - 50%/SALE</font></a>
<b><font color="#80ff80">CLICK A LINK</font> - <font color="orange">Make MO MONEY</font></b>
