That's the thing though isn't it. Star Citizen could well find itself in a similar position to ED where on release they are pushing out a diluted anaemic vision of what people bought into. As hard as the fall is here for some like myself as an alpha backer the fall out for team star citizen will be tsunami dwarfing in comparison.
Having said all that I have more faith at this point that team star citizen are going to do it right unlike the bunch here. Maybe that's down to effective regular and detailed communication also unlike here but who knows.
I backed SC with a single (lowe-end) ship. About the cost of a good AAA game. The difference is that SC is guaranteed to give us Squadron 42, the single-player story driven game (ala Wing Comander 2015/2016). So even if the PU fails miserably, S42 is likely to be worth the entry price given the "chariman's" previous games. If the PU is good then the game will explode like EVE in its hayday. If not then the tsunami will consume it but we'll still have S42 in our hands.