Well, if this other site wants to link to Elliquiy, you don't have to provide a link-back in your signature. But if you
want to link to this website from your signature, then the website would need to provide a link back to Elliquiy.
This was my understanding of the rule, anyway.
You may link to your site in your signature as long as: 1) The site links back to us; 2) It is not a pay site; and 3) It is not a referral or affiliate link.