Important to scroll up and see that this statement is made in the context of Dan Luu discussing how expressing an interest in writing can be damaging for your job prospects, regardless of your other merits/skills.
Patrick is chiming in on how his public writing may have greatly benefited Stripe.
Specifically, the context seems to be 7% of people joined the team due to his writing, not that he is worth 7% of the team. Others in the thread seem to be reacting negatively based on the second interpretation.
It took me a while to work out that he was saying "7% of recruitment it due to my work" not "I am so amazing I am worth 7% of Stripe's massive engineering team".
Linking to what tweet out of context is probably going to get Patrick a lot of undeserved hate.
Twitter's market share has only shrunk, and their user base has been flat since about 2015. It is "popular" with a very specific group of people but I don't think they've ever topped 350 million human users at any point in their existence, which while not small, but they're not growing, either.
It took me about 30 seconds. It was obvious to me that the tweet was missing context so I had to read the thread. Which wasn't very long to begin with.
The UI does not clearly present the prior tweet in a conversation when linking to an individual tweet. This makes it easy for people to ignore the context since they have to work to see it. Combine this with the preference for using real names and it is easier to make the "look at what an asshole this person is" posts.
Early in my career I did some bouncing between tech writing and programming gigs (my undergrad degree, after all, was in English and I have close to no formal education in c.s.), and a big part of why I ended up staying on the programming side was that it paid way better than the tech writing did.
Patrick is chiming in on how his public writing may have greatly benefited Stripe.