They have a strong email list.
And... they wish they had started building it WAY SOONER than they actually did.
If you ask them now, they will likely attribute the vast majority of their success and revenue as a direct correlation to the size and quality of their email list.
It's something that's so easy to overlook when you're just getting started, and even after you get some traction it's easy to get lazy with.
And the craziest part?
That this is the one universal truth behind EVERY successful business owner who sells anything online, regardless of what niche they operate in.
This clearly isn't some fad or anomaly.