Matrix blacklist

I am listed on Now they have intrduced USD 2 for registering an abuse email and delisting? I remember it used to be free you just needed to verify your email from your domain.
Is this list relevant? Or is it a scam like to extort money from you?

I’ve no specific experience with this list, but there seem to be options for free and paid delisting.

I am not sure why they put me in the paid IPs. It use to be free. I am not paying them. Hope that it will not have an impact.