Valve doesn't but the companies that use Steam as a platform do. For example, your Titanfall purchase on Steam is now useless, and actually it was useless for

Valve doesn't but the companies that use Steam as a platform do. For example, your Titanfall purchase on Steam is now useless, and actually it was useless for the entire time it was available for sale (since the servers were never operational at any time during the period it was available). All of these titles they're talking about Ubi are available on Steam too (and the article specifically notes that some of them are still on sale with no indication they will be removed in less than two months). "Steam games can't be taken away" is false, and "valve as a company hasn't taken away your orange box yet" is not a particularly interesting or insightful observation. And to be clear, they are legally allowed to do so under the ToS under some circumstances!