If this is a financial product... so are money bags, UV note checkers, coin holders etc.
It is a machine that does a job, it's a computer by all accounts.
If they had done a kick starter or a proper "crowd funding" thing, then no one would have a leg to stand on RE: DSR's, but as they offered an actual product, with set design specs and a shipping date (of sorts, bunch of lying cu*ts), then they are accountable to the DSR's, just as any person who sells something for a set price online, eBay, Amazon Market place etc, you sell for a Buy it Now, and ANYONE can return it is they don't want it, up to 7 days after purchase, without any penalty or re-stocking charge, yes, it sounds unfair, but this is THE LAW, these are the rules, if you want to be an online business , you need to adhere to those sort of things.