I just asked SiteGround if I can use their Railgun for a non-www domain and this is what the support said:
Hey, Indeed when you use Cloudflare DNS zone you can use Cloudflare for non www domain That is possible because Cloudflare can proxy the non www A record to their CDN I am afraid that this is only possible in case you use their DNS directly . We cannot do that for the non www domain if using our nameservers
I noticed that my Railgun State is Active in Cloudflare but turned off so I activated it.
I have a non-www domain and I want to know if activating Railgun through Cloudflare has a negative impact compared to Sitegrounds Railgun that needs to have a www domain.