It is very nice to be able to compute this in our browsers without limits or registration. The results are not always perfect but already allows having good time testing remixes or doing karaoke with friends! Thanks for sharing your work.
I envisioned my site would be useful for quick and dirty prototyping - especially since the outputs are not licensed for commercial use.
Then, when one's project idea is validated, they could then used a paid stem separation service with higher quality and commercial licensing.
That's why I added some sentences on the website to solicit partnerships for targeted advertisements, to see if any pro demixing companies were interested.