"I want the free service to work for my edge case"
If you want to continue serving your clients, you can still pay for a certificate from an authority trusted by your outdated clients. If you want to continue serving the old clients for free, ask them to use another free browser that will allow them to do so.
If you want to continue serving your clients, you can still pay for a certificate from an authority trusted by your outdated clients. If you want to continue serving the old clients for free, ask them to use another free browser that will allow them to do so.