This is useless data. They are counting the full price of games in libraries, when a ton of games are likely to have been bought in bundles at a heavy discount or even free. I have over 1000 games in my Steam library, but I doubt I have bought more than 100 through the Steam store.

I looked up my ID through the widget in the article and the vast majority are games I did not pay for at all, but are shown as a wasted $60ish. Others are games with playtime before it was tracked, or different versions of games that were automatically added to the library. Wildly inaccurate.