In another comment you wrote: "what I like about Substack and Medium is how easy it is for people to subscribe and discover. Their "distribution" is great." Th

In another comment you wrote: "what I like about Substack and Medium is how easy it is for people to subscribe and discover. Their "distribution" is great." These license conditions allow them to make that discoverability possible. It's probably just legal language to make sure that they can do that.