No - you are being far too generous towards Stripe here. If they say they cannot hire due to headcount, after saying they were going to make an offer, and they'll reach out again once they have headcount again - they are ghosting if they never follow up.
They lied, full stop, don't apologize for how "polite" it is (and it's not polite, it's disrespectful).
They lied, full stop, don't apologize for how "polite" it is (and it's not polite, it's disrespectful).