Equity.
"Why is this better than Spotify, considering it costs the same (not counting the 3 month cheaper bit, which I never do) and probably has no more available music than the latter."
You know, my initial thought was that, if Rara can pay musicians more than the "laughable pittance" they get from Spotify, then Rara might be able to sign up quite a large number of musicians, migrating them away from Spotify, thereby increasing Rara's available catalog while at the same time decreasing Spotify's.
But then I recalled that the majors are equity holders in Spotify, so there is no way that Rara could match the deal that the majors get from Spotify, without giving them equity too.
But I wonder, should the majors not give Rara their catalogs at the same rates they give Spotify, if Rara could sue Spotify and the majors for anti-competitive practices, restraint of trade, and so on along these longs.