That may be, though it's also worth noting that in the long lists of exceptions and caveats, the studios get about three weeks to stream those television episodes before they have to pay anything at all—and doesn't it seem likely that most of the money generated from streaming those shows would come within a few days of the original broadcast?
So, that big win looks a bit chimerical. But the writers had to end the strike now or face the prospect of many more months of being out of work, which many would not have supported. And the guild may have positioned itself well for next time.
The deal supposedly gives the guild a peek at the numbers so it can figure out what the studios really do get from those ads. And the writers have now synced up their contract expiration date with the actors. So should the studios balk at giving the writers a real cut of the gross from streaming video next time (assuming it's worth having), the two unions could join hands and make some real trouble. (link)