Why don’t you support HSTS policies for SSL?
HTTP Strict Transport Security (HSTS) are meant to force browsers to only load your site over HTTPS. While this is a good goal for security reasons, there are several other ways to force HTTPS / SSL that are safer, esp. on a mass scale such as a web hosting network.
We may re-consider in the future, but for now we will not support this HSTS headers to avoid unnecessary conflicts, errors, down time, confusion, etc.