SSL status isn't changed with the pro plan. If you want non-SNI clients to be able to visit your site, you need the Business plan which assigns IPs to your website that serve your SSL even without SNI present, but this is usually unnecessary as the non-SNI client base gets smaller every year. All of the major browsers support modern TLS and SNI so the free plan will work as long as you don't need to support users running XP or odd mobile browsers on 5+ year old Android.