I was curious so sent an email, turns out you have to pay a monthly subscription fee. So, it's not the kind of revolutionary organisation it makes itself out to be.
For me it would work out the same as buying film from any other outlet, if not more expensive.
Anyone on here involved with or a member of Balcony? Somewhat mysterious but prices and turnaround seem promising.
https://www.instagram.com/balconyfilmlab/