LOL, I get that a lot too.
"The first version is 90% done.", they say.
"I just need to delegate it to a tech co-founder so I can focus on business.", they add.
"You'll get double-digit equity, up-to 13%, even.", they conclude.
For me, "co-founder" starts at (100 / n)%, where "n" is the number of co-founders.