There's several independent variables (money / trial and error / twitter following / coding ability etc ...)
this clickbait paper makes it sound like age is the independent variable. when age is merely CORRELATED with these independent variables. Age itself is of little importance.
You may as well say:
"A person who has already started 5 startups is 4.9X more likely to found a successful startup than a person has never founded a startup before"
Google "Multicollinearity" before you vend BS clickbait.