In starting to write a comment on this I did a little searching and found out that YC takes common stock rather than preferred (at least according to this: http://venturebeat.com/2007/04/16/y-combinator-continued/). It is interesting since the statement above is only true as long as common with no additional rights is given. I wonder what the terms of the "copycats" mentioned are -- does anyone know if they are asking for preferred or other rights for their equity?