freelancer.com – What does “personal use” mean here?

I’m trying to sign up on freelancer.com as an “I want work”. I’m getting the following prompt:

Do you intend to use Freelancer for personal use? Using Freelancer for cases other than business may be subject to additional VAT.

What does “personal use” (and “business use”) mean here? Obviously, I do want to earn money there – does that mean I’m a “business” user?

I’d ask Freelancer.com’s support, but to do that, I need to have an account, so it’s a catch 22.