Steam Limits Users Who Haven't Spent $5 to Prevent Spam, Phishing
Steam: Rails to Riches v1.1.1 Immagini

Valve: Accept New Steam Subscriber Agreement Or Disable Your Account
Steam: Rails to Riches v1.1.1 Immagini

Indie developers report Steam refund abuse - Gamespresso
Steam: Rails to Riches v1.1.1 Immagini

Steam Now Requires Users to Disclose Paid Endorsements - GameSpot
Steam: Rails to Riches v1.1.1 Immagini