>I can't see any reason for 128kbs

A lower price tier? Or even a Freemium model. Considering most of them are already available on Youtube. As strange as this may sound I dont think Streaming is the business model that will save Music industry. And despite the headlines ( whatever MSM likes to print these days ) most artist's real income are from somewhere else.

128k Opus is quite a bit better, if for some reason that bit rate is crucial.

Streaming definitely wont 'save the industry', it woefully underpays the artists.

You're only making that problem even worse by offering a low quality, even lower price model.

Frankly I can't imagine there would be many artists particularly happy with having huge swathes of people introduced to their music at 128kbs.

We shouldn't destroy the industry even more just so that some people can get it even cheaper than they can already.