See How Folks Are Using People Also Ask Spam Site For Keyword Research
https://www.reddit.comIn this AMA on Reddit see how PAA question/answer sites in the vein of https://askinglot.com, https://everythingwhat.com, or https://midogguide.com are used for fishing keywords for real money sites.
Here is the sample site this person runs https://modernbloke.com/
According to them
First, I will get a list of keywords from Ahrefs and scrape the related PAAs. Then I will put up automated 1000-5000 articles made out of longtails (PAAs) on an aged domain and let them age like cheap wine for 3-4 months. After that time, I will run my Google Search Console script, which analyzes which keywords are the most promising. I will choose around 30-100 keywords that are getting the best results and send them to my writers working on my white hat site. Then I will delete these articles from the PAA site so that I’m not competing with my white hat site.