I'm somewhat hopeful about the synergies here. Giving musicians an easy path to monetize their catalog, as well as market their availability to be commissioned

I'm somewhat hopeful about the synergies here. Giving musicians an easy path to monetize their catalog, as well as market their availability to be commissioned by brands, is a good thing... especially when artists are being dually hammered by Spotify's deci-cents-per-stream industry baseline and live music promoters' anticompetitive behavior. That said, there are ways Songtradr could abuse their new position of trust. I hope they're smart enough not to do that, but I also hope that an archival project for free downloads on long-inactive Bandcamp accounts is underway...