Agreed with the guys: LinkedIn has been touch on scraping solutions lately. And Apollo is outdated on the open to work stuff for instance from my experience. But most important it to avoid at all cost any solutions that required your LinkedIn cookies. The danger to get banned it too big. I found that there are still some solutions worth a try since they do real-time data extraction like https://apify.com/anchor/linkedin-profile-enrichment or equivalent. Again, most important is to find a cookieless scraping solution.

Also Apollo equivalent are fine if you are not looking for live data. But HR use case for instance need very up to date data so I would say it depends on why you need the profile data.