I know this one method, it's working like a charm.
1. Go to google and increase the result page content 100.
2. Use boolean tools for the keywords. Eg : "LinkedIn" AND "Founder" AND "United States".
3. Then install the Data Scraper extension to scrape the publicly available data.
LinkedIn doesn't punish you for this, cause you scrape out publicly availed info from google only.
If you are looking for an efficient and cost effective way to scrape Linkedin you may be interested in checking https://www.vayne.io/en
Let me know if you have any question.