We do support the addition of wildcard subdomains. Here's how to do it:
#1: Login to your Control Panel
#2: Click the Subdomains icon
#3: In the "Subdomain" name field, enter *
#4: Set the document root as needed (public_html usually works)
#5: Click on 'create'
Still need help?
If you need further assistance than this entry provided, please, do open up a support ticket, we are here to help you out