https://dotabuff.com/pages/enabling-statistics

Copypasta for everyone:

Valve has taken the stance that all player statistics should be private by default. This means that Dotabuff only has access to your statistics when you manually enable it.
In order to enable statistics, please take the following steps:
Open the Dota 2 game client
Click the Settings icon
Navigate to "Game", then to "General"
Set the "Share Match History" setting to "On"



You may be on your merry way to continue being proud of your gold/plat status now. Again.

This post has been edited by jlim87: Feb 1 2013, 08:46 PM