Made $800 with a forum post.

The post starts like this:
"A Bootcamp for your UX. I'm building a community of founders who do regular usability tests for each other. You do 3 tests per week, you get 3 tests per week. You commit to improving your UX every week for 6 weeks straight. [...]"

And ends like this:
"It’s $90 for the entire Bootcamp.
That is $15 per week or $5 per test.
Interested?
Reach out at [email protected]"

I started writing on April 30.
I posted on May 15.
22 people responded.
I sent them a Stripe payment link with a discount.
16 people paid up and are now members of the UX Slack group.

I didn't create a landing page.
I didn't design a graphic.
I wrote a convincing post.

Writing is powerful.

PS.
Great PG essays on writing

• http://www.paulgraham.com/writing44.html
• http://www.paulgraham.com/useful.html
• http://www.paulgraham.com/simply.html

Great books on writing

• https://www.goodreads.com/book/show/10569.On_Writing
• https://www.goodreads.com/book/show/13155290-several-short-sentences-about-writing?ref=nav_sb_ss_1_19