I can understand what SaaS model music delivery can provide to the music producer i.e. sustainable income, Which is good.

But how does SaaS model specifically solve the problem of overuse issue for the consumers? Would each subscriber get unique music each month? If so wouldn't it be nearly impossible to scale unless you generate music algorithmically?

As for copyright issue, E.g. Does YouTube strike copyright claim when consumer 2 uses same royalty free music as consumer 1 in-spite of providing proper licensing details for the music? If so how can that issue be resolved?