gotta say, checked out one of theirs, and they're exactly 200% as expensive as Naturally-Extracted-Tobacco.com's. N-E-T also allows me to choose "cold macerated," which is how i make mine. 120ml glass bottles ⩯$40.
50 or 60ml of pure extract = $4. And the bottle would be another dollar.
I don't know what the future holds for Vendors, but I will keep vaping, and I will keep enjoying NET flavors. Three years into homemade NET's and I have maybe eight flavors I keep going back to.
Are they as clean as Vendor liquids ? No. Anything with Vanilla top notes will gunk up the coils in 4 or 5ml, while cleaner blends like 84 Turkish and Anniversary Kake might last 10ml before a dry burn and wick replacement.
Every winter I make maybe 600ml of various extracts for about $50. Time and patience, with a little bit of effort, and I have two to three times more than I can vape in a single year. And it's not hard to do, at all.
My advice would be to stop fretting and come up with a backup plan.