I stumbled upon this listing being sold for $6 million. Yes, that’s not a typo. $6 million for a website.
It generates $2.6 million in net annual profit, which is around $216,000 per month.
I did a bit of digging and suspect this site is vaping360.com
Clues:
1. «keyword rankings for c.211,000 keywords»
In June 2020, it ranked for exactly 211k keywords:

2. Launched in 2015
Indeed, it started actively driving traffic right around 2015:

3. Boasting over 1,100 posts
Ahrefs shows 1,052 posts:

4. CBD related products
It has CBD pages as well:

5. 495 news articles
Ahrefs shows 407 news items:

So there you have it. Outed the site and outed its revenue.
Now let’s check the legal landscape of the niche itself:
https://en.wikipedia.org/wiki/Regulation_of_electronic_cigarettes
«In the US and the UK, the use and sale to adults of e-cigarettes are legal»
Sales to adults are legal in the US and Canada, but governments keep trying to tighten regulations every year. It’s a grey niche, but that didn’t stop these guys—resulting in $2.6 million a year.



















