There aren't 2 million backers.
That was an upper estimate cap based on the number of accounts I've seen around the web to date. But even if it's half at 1M (which I suspect is closer to real number), then that's still $220 per backer. But it's most likely a significant number of the fan base will likely have exceeded that average in upgrading from their starter ships.
Regardless, that is still an affordable amount i.e. relative to gifting Zenimax FIVE years of DLC updates for playing ESO on their broken and buggy servers.
Or paying Bethesda $40 - $60 for bare bones, MVP base game Fallout 76. Where one time, rip off notorious marketing for the likes of Nuka Dark Rum, the infamous canvas bag debacle & $300+ Collector editions not considered). Besides those one time capital cost, paying Bethesda an additional $13/mo for their P2W Fallout 1st subscription. Just to access their even more broken and buggier private servers.
Paying CI a one time average $110 - $220 then waiting for game release (regardless of whether you're alpha testing the game or not in process) seems to be the CHEAPER and far more practical investment IMO