This is the mentioned startup from that "Stripe & YC are the Mobs of Silicon Valley" tweet thread:
https://twitter.com/theryanking/status/1485784884681474048
In the tweet: Ryan Breslow, CEO of Bolt, talks about how Stripe funded Fast which is a competitor of Bolt, and for the same valuation despite Fast having no traction and being relatively new.
(I do not condone or condemn the opinion of this person, just thought it would be relevant to this post)