1) Do it for the love of the music.
2) Become a business.
Some bands are lucky enough to do both - not most. Survivorship Bias is key here, and the overwhelming majority of bands do not make any money or perhaps even lose money chasing their passion.
"Just getting feedback" is cool when you're in it for the love of music. For the rest - you do need a way to market yourself, sell merchandise, promote your next show, sell downloads or CD's, etc.
Get the benefits of those things without doing them yourself.
You are probably talking to very early stage musicians who would enjoy using Soundcloud over Bandcamp for feedback reasons.
edit: your product showed me a loading spinner and then crashed, so. not sure what you think you're doing