Earlier quoted context omitted.
The post says they raised "$250,000 from friends & family". That seems like a strong incentive to make sure your investors (read: loved ones) can recover their investments.
Would the typical VC deal allow founders to return money to their seed round investors before the VCs?
Seed round funding usually uses a convertible note. Assuming the VC round is a priced round, the seed round investors are treated as if they had put in money during the price round.
Thus they would have same class of stock as the VC investors, with the same liquidation preferences.