I was a member when the site first launched a few years ago. I used it primarily to preview the DVDs which were then sold for $5 each. I really like Pure Barre, but did not use the site enough to justify the $30/month.
As the site was fairly new, the library was a bit thin on newer classes (I also prefer the DVDs since I find live classes distracting). There are new classes added on a regular basis but I am not sure if that is weekly or monthly. You can use the free trial and you do not have to pay anything if you decide to cancel before the free period is up. A brief look at the content shows more than 60 videos of 45+ and nearly the same number of 30 minute videos.
Youtube has a sample
foundations class which may help you to decide. The Pure Barre site has a
second foundations class (no registration needed).