If "too many customers" becomes a problem (increase in customer service expenses, etc) I'd consider it. But right now that's not an issue and I love that it's cheap.
I believe you're doing it Right, both from an ethical perspective and a business perspective. At this price, you can position yourself to be the distribution partner people choose even after the market evolves to fit reality. It will still be easier to use your service, and you can add additional features for marketing, discovery, licensing for other purposes (like film use of songs, or for commercial use in businesses, which is owned by Sirius/XM and their ilk currently) and more.
Congratulations on the launch and all the positive feedback. (We build with Railo too.)
Congratulations btw! :)
When selling to independent musicians, you want to compete on price.