I believe the distinction is those companies which have "coming soon" or "in development" products also have a reputation behind them. Unlike Kickstarter or such sites where there is a level of anonymity, along with a history of many projects getting 'lost', These sellers which we trust have a history of good products.
The likes of Mousa Models, where near half his 'products' are in development, you dont know if itll ever get made, but the deposit isnt much and he is willing to talk to customers and inform them on the goings-on. Not to mention when something is made, its widely praised and sought after.
Coopercraft has long passed the point of crowdfunding mystery. His refusal to cooperate and communicate is clear.
You choose what to do with your money in the end, but what Mr Coopercraft has done is abuse the goodwill of our community and prey off the ignorance and trickery that is his website.