Might've been financed on credit - but even still, it takes a lot more than $12k for a down payment.
Assuming the median price for a home is $500k, you'd need $100k for a traditional 20% down payment. Sure, $12k is 12% of the way there... but it's nowhere near what is needed for an actual down payment.
I'm a AAA game dev and a number of former co-workers are at Netflix nowadays. Like, a suspiciously high number.
They can't tell me anything (of course), but I can put two and two together.