I bought it two years ago, and according to Gumroad, the version I bought has made 3,499 sales. It might be more due to different versions of his course, and it

I bought it two years ago, and according to Gumroad, the version I bought has made 3,499 sales. It might be more due to different versions of his course, and it's certainly not much fewer than the pool of 4,000 he's using to calculate the failure rate for YC founders.