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Steam Families is here
(store.steampowered.com)
Steam is a video game digital distribution service by Valve.
Steam News | Steam Beta Client news
Useful tools:
SteamDB
SteamCharts
Issue tracker for Linux version of Steam
It also stops people from buying a game, sharing it to themselves on an alt account and using cheats. Then just spinning up a new alt account at no cost when the first one gets banned.