Sharkscope.com and its database is used by many online poker players to determine the quality of opposition they are playing against and also to track their own progress in tournament and sitngos that are played online at various poker sites. Other sites in this category include officialpokerrankings.com.
The use of these database sites have caused heavy debate in the online poker forums. The information that is provided is considered private and many poker players do not like revealing their return on investment statistic to random people. Imagine if somebody could access your bank statements or know how much you get paid each week. Since a tournament result can be easily obtained by each poker room, these database sites gather the data and provide statistics on the profitability of a player and the types of stakes that they play.
Officialpokerrankings.com has already made a move to remove all full tilt poker results from their database in June after the site made it clear that it is a breach of privacy. Watch for websites continuing to try and protect player privacy and block out datamining sites from gather player information with permission of players.