A BoD usually means a Delaware C corporation, and that usually has some lawyer expenses. May have some founder employee agreements for some more lawyer expenses. And there may be insurance for the board members, e.g., as at

https://en.wikipedia.org/wiki/Directors_and_officers_liabili...

But really what I meant was that, when there is a BoD meeting, say, monthly or quarterly, the members need funds for travel, food, and lodging, and usually the company pays for those. Just one BoD member flying first class and staying at a high end hotel once a month could eat into a $20,000 seed round in a hurry.

Or, one or a few co-founders, living cheaply, on their own savings, each with a $1000 computer, typing in software can be cheap and where a seed round of $20,000 to $40,000 can do well for Internet fees, publicity, maybe cloud fees. That's what I had in mind.