Interesting. No attempt to be binding, but as part of their vetting process, maybe even more important in practice than a contract. I hadn't really looked at Crowd Supply beyond noticing that a number of libre hardware projects have used it. I guess for good reason, pretty impressive, with obvious caveats. Had to glance at https://wiki.snowdrift.coop/market-research/other-crowdfunding

Crowd Supply focuses on rivalrous goods (i.e. hardware) so don’t really fit as a platform for most FLO projects but may be a good choice for FLO hardware startups. Along with threshold campaigns, they also offer a market for selling already-funded hardware.The platform isn’t entirely FLO itself (at the time of this writing) but works without proprietary JavaScript and emphasizes encrypted contact options to protect privacy. Although they have no FLO requirement, a greater portion of projects seem to emphasize FLO values compared with generic threshold sites.