No, it actually says you need to sign in with LinkedIn to verify you work for the company you say you do(also not hard to fake so don't know why they insist, my bet is this is a LinkedIn employee). No thanks, and no guarantee that your info isn't shared etc. This seems like it has a high potential for abuse.
We'll add the guarantee your info won't and can't be shared.
No account is Candid required, we simply use the LinkedIn API to check that the current position for that would-be reviewer has a current position at the company they are trying to review.
As you mention someone could scam that of course. We're working on ways to get even better data (i.e. real current employees).
This is our MVP and we wanted to get people scoring companies as frictionless as possible.
I'm not interested in registering, but looking at the sign-up page, it seems signing in with LinkedIn is optional, is it not?