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Spammers often have difficulty spamming more than one engine
at the same time, as different spamming methods must be used for each
search engine. Spam results will tend to receive fewer votes from multiple
sources. A spammer may have top ranking on one search engine, but they
won't achieve it on Mamma unless they're able to spam ALL of our sources,
an insurmountable task for even the best spammer.
Here are some interesting stats about rSort:
- On average, the Rsort algorithm places the first
8 results on Mamma.com® (i.e. there are, on average, 8 results
with duplicates).
- The Rsort algorithm affects the ordering of our
search results on average about 80% of the time (i.e. there is
at least one result with duplicates for 80% of searches).
- The two engines that vote the same the most
often are MSN and Teoma. Interestingly, on the average query,
MSN and Teoma results match up only about 7% of the time, meaning 93% of the results they return are unique.
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