The way they're reporting it is very accurate. Which is confusing as most PR releases use slightly different metrics.
With this treatment roughly 25% fewer people who needed to go on ventilators died. In the group that had no particular treatment, other than the usual antibiotics, (very roughly) 40% died. When they were given the treatment only around 30% died.
When given to the less slickly people who didn't need ventilators, or weren't suitable for them, it still saved lives but more people needed to be treated to save a life, as most of them would have survived anyway.
It really is great news, not a magic bullet but great news. Since this stuff is out of patent and easy to make it is much easier to get hold of than remdesivier, which is a few thousand times more expensive, harder to make, less effective, and in very short supply. And was until today the best treatment we knew of.