Yes, it does look that way, those flavors are also made by a Chinese company, Dekang...so not sure of their sources.
My reason for DIY was to re-create a specific comm. juice that's no longer made, and I loved it. That is now (thanks to these guys here) no longer a problem, I got a taste 'close enough' of the old Johnson Creek Original in VG.
Would be very surprised if those were tobacco's which they purchased in 'absolute' or tobacco extracted forms. So without them releasing more info can't really say for sure. They do not specify origin.
If they are formulating their own "from scratch", as does Johnson Creek in Wi., it would be a rarity in the commercial world State Side. Rocky Mountain Vapor, Vermont Vapor, also do their own mixing, and that's only two mentioned, many do every batch to order, but I have the idea these are bottled flavors. A person would go nuts trying to "make" 36 different formulas with variable nic in both VG and PG to please even 30 people a week, you would not have time to sleep, and you sure wouldn't "make" any money!
There are some of us who are striving for "real" tobacco e-liquid in the realm of DIY, it's a very tricky, costly, taste-based fun thing...with some great successes!!!
I'm just not about to start growing my own tobacco at this stage, I may get pretty desparate for a smoke in the meantime! I'm content to buy the 'absolute' form for now.