That clearly shows a vast improvement in skill. A luck doesn't improve over time. If it was "mostly" luck they would get roughly the same outcomes the second time.
And to your last point, who is saying it’s wrong for employees to get more stake? Of course it’s not wrong, but as an employee you have to negotiate that. People can’t just magically get what they feel they deserve because it would add up to way over 100%. Remember, the company exists because of the founder, doesn’t matter how much you think you contribute, because at the end of the day the company does not exist without them. If you can convince them to give you more then you should, and if you can’t you are free to start your own company. I do not see what is so unfair about this situation and I say that as instrumental #1 employee who got less than 1% for a 9-year effort building a moderately successful company. You don’t get what you deserve in life, you get what you negotiate.
The two aren't mutually exclusive.
Startup outcomes are mostly luck, led by people who (have to?) believe that they aren't.
You people seem to fixate on the Facebooks of the world instead of the other 99% of businesses built on blood, sweat and tears.
Probably because most of this website sits behind a desk writing software thinking it gets sold because of magical fairies and luck, not 10000 agonizing cold calls.
And negotiation require knowledge. This thread is about being told to not discuss that knowledge publicly and to not acknowledge the real life implications of certain equity splits.
As I said in another comment, this is like saying employees should have negotiated better salaries and then firing them for discussing salaries.
Because it's true? Studies (Gompers, et. al. (2009)) indicate that a second time entrepreneur has a 30% chance of success versus a 20% for a first time one. So there's some skill in it but it mostly comes down to luck.
edit: And if you're arguing skill then clearly the skill of the early employees matter tremendously and not just the skill of the founder. So why do you think it's wrong for those employees to get more stake?