Sure, Mongoose made their licensed version of RuneQuest Open Game License and released an SRD, then did the same with the later Legend rules, which are both built off of Basic Roleplaying (BRP). But to have Chaosium do the same for their actual "house" rules? Color me surprised:
Original thread here: https://basicroleplaying.org/topic/10565-new-version/page/5/?tab=comments#comment-162231
Tip of the hat to Rob Conley of the Bat in the Attic blog.
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