Some company's make huge batches of
juice and dispense it into bottles and ship it to you. That particular batch could already be a month old, so it would already be steeped when it hits your mail box. Other company's make their juices to order. That means that they don't make huge batches. When you order a bottle, they mix that one bottle specifically for you, so it's as fresh as you can get it.
Some flavors are good as soon as they are mixed. Some flavors require time to sit and allow the flavor to "mend". I've went
through several bottles of Vermillion River juices, and I haven't had to steep any of them. I assume they dispense their stuff into bottles form large batches. That being said, if you order from them, it's possible, your bottle could have been from a fresh batch made that morning. I've never heard of any company purposely pre steeping their stuff. From what I've found, you just have to order it, taste it, and decide for yourself if you like it the way it is, or if it's worth steeping. Keep in mind, that taste is subjective. If it tastes rancid, no amount of steeping will make it good. I've steeped a few juices, and pre steeped, they tasted almost like nothing, but after a week or so of steeping, the flavors come out, and it becomes enjoyable.