days == months == launches == rounds in reality.
Unless you had the actual, initial idea, no future team (doesnt matter time) is going to be considered a cofounder. Meaningful equity and terms wont be given out after that standing.
Incoming employees need to realize that -- equity++ means nothing; most should request a reasonable salary.
I see your angle with this, but I've personally seen Co-Founder thrown about as a perk in exchange for lowered compensation when the company is still fresh enough. A person who could add value might be offered to come in as a VP with substantial comp and equity but trades a good chunk of that comp away to be called a Co-Founder instead.
It kindasorta betrays the idea of what a founder is, but somewhat like how time is meaningless by your example, so too can be titles.
> Incoming employees need to realize that -- equity++ means nothing; most should request a reasonable salary.
Yup. Unless you've worked for Palantir. Then your shares are worth their weight in magical fairy dust.
So, a lot?