NOT Free. Don’t answer simple questions about cost. Try others

‘Free’ is a simple idea. It means no cost.

‘Free Trial’ implies that you will pay after deciding it works for you.

But this outfit claim the stuff is free, but demand a credit card before it will work. Even when asked, they give no details about what the eventual cost will be. I’d have been happy to try a crippled test version, or a time limited version, knowing that the full thing would cost X.XX after a week, or whatever, but no, despite emails, no idea of what the cost will be.
Save wasting time by installing and integrating it. Just don’t bother.