I'm new to Steemit, only about a month or so in so I haven't seen what it's been like before I joined, but I am slowly seeing established Youtubers coming over to DTube, i'm seeing many people suggesting the platform in the comments of big channels being hit hard but YT. I discovered Steemit when I was researching the Blockchain, not through referral. The role of referrals is going to be huge in growing the platform.