Too bad, now people can't make jokes asking each other if they're StartupLJackson. I will say that the Panda picked up on a gigantic clue early on, which is that Startup seemed close to Naval Ravikant -- someone who is reportedly not that easy to even meet in person, much less get to know.

Parker Thompson also is very into diversity in tech. Very supportive of women:

Thompson is sensitive to being white writing under a black man’s persona, even though it’s a cartoon. When one woman asked Startup L. for help establishing her first fund for minority and female entrepreneurs, he didn’t invest, but he did meet her in person. Thompson—not Startup L.—became an adviser to her firm. “People just want help,” he said. “But there just aren’t that many people who are in the industry who will respond to you if you have 500 followers, you know? They’re just like, ‘Who the f--- are you? Leave me alone.’ ”

And started 500's fintech practice -- invested in Credit Karma? -- before leaving for AngelList:

https://angel.co/500-fintech-bitcoin

Now 500 has a new fintech fund: http://500.co/announcing-500-fintech/

PT is learning to let go of his pseudonym.

Now that Startup L. is retired, Thompson doesn’t mind the secret getting out. It’s never been a tightly kept one, anyway. Dozens of his friends and colleagues have known for years, and he stands by everything Startup L. Jackson said. It also can't hurt Thompson's career to be known as the person behind a voice many found smart. “I imagine more people will go, ‘I’ve heard of that guy,’ ” he said.

Thompson recognizes that life with the mere 3,536 people who follow his real Twitter profile (@pt) doesn't deliver the same rush. He might pull a Steve Martin and dip a toe back in—Startup L. is scheduled to do a live chat on the startup forum Product Hunt in a week—but it won’t be like before. “It’s like quitting cigarettes,” Thompson said. “There are days when someone says something on Twitter, and I’m like, ‘I have the best tweet for this.’ But I let it pass.”