They financed the company with credit card debt and were already doing $250,000-$500,000 a month in business when they finally got venture capital (after 70+ unsuccessful tries). However, they agreed to a forfeiture contract and a 4-year vesting period, and strongly advise everyone else not to do it that way.
They were so disgusted with the way they were treated that they sold off all their shares long ago. If they still held them, they'd each be worth about $24 billion today (they had 30% of the company, like the Google founders).