I believe it's for this reason: to make a decent profit. It takes them pretty much just as long to mix up & bottle a 24mg
juice as it does a 0 nic
juice. About, what, 4 seconds less time? Do you really want a discount on that amount of time? And I haven't seen that most vendors mix to order. I've seen that some do. Just as many sell premade juices. And I'm sure they pay the same for those in varying levels of nicotine. I know they say they mix to order, but I'm willing to bet that sometimes they actually mix up a couple bottles worth of
tobacco flavor, 24mg because they know they have three or four orders waiting to be filled that day for Tobacco. The one that wants zero nic will have to be mixed alone. There is more time spent mixing. See what I'm getting at here? You are paying for not only their products, but their time.
You can mix your own if you like. And I have done this and still do sometimes, but I found that ordering a jug of PG isn't all that cheap, nor is ordering a jug of nicotine liquid. Of course it will last the rest of my natural life. But it isn't $.03 a liter.
I love Tasty Vapor juices too, but in reality, they are in busines to make money. You are paying $15 for a 4 oz. bottle of flavored liquid. Surely a mil or less of nicotine doesn't increase the cost by 75%? But it's a great product, so it's worth it. And $15 for 30ml of liquid is pretty reasonable I think.