We usually use HTTPS in Clearnet for encrypted data while using a site I searched a bit about in Onion and yeah you're right it doesn't need the HTTPS protocol because the Onion routing itself is encrypted enough.
It's been almost a month, and my support ticket still hasn't been resolved.
Their support staff might be on vacation which is why no one yet responds to your case. They should assign or hire someone as temporary support if they are indeed on vacation.