Making your own vanilla sugar is easy.
I really don't understand the need for vanillin sugar. Bleh for that taste.
No, I make my own vanilla sugar, and it's a piece of cake: it needs a small jar of sugar, into which you stick one or two of the dry black vanilla pods, cut down to fit into the jar. Close the lid and let things sit for at least two weeks. To use: just use vanilla sugar instead of normal sugar for wherever you want the vanilla taste. Yum!
These vanilla pods seem inexhaustible. I just add sugar whenever the jar starts to go empty; I don't even know when I started my current jar, but it's been on my spice shelf for at least 5 years, probably closer to 10.
And this mercan idea of having vanilla in liquid form? I don't get it. You make your vanilla tincture, your vanilla pod is exhausted, when you run out of tincture you'll have to get another vanilla pod to make more. Vanilla pods aren't all that cheap ...
Of course, I've never made nor used liquid vanilla, and if you want to convince me of its value you'll have to include your "and this is how I make it" recipe. Because I've never seen it in our shops: people buy vanilla pods, not vanilla tincture, over here.