Earlier quoted context omitted.
What's the problem with that? If Gitlab is not paying top of the market salaries, then they're just going to miss out on top talent, and clearly they're fine with it. It's a free market after all, you don't have to join Gitlab.
Absolutely nothing is wrong with it. Just don't call yourself a world leader.
(not saying GL are, there could be other unrelated things precluding it)