There are more than 350 legal highs, but many see them as a poor substitute
There are now more than 350 NPSs identified by the European Monitoring Centre (EMCDDA), but just because we have these products doesn't mean everyone's buying them. I took a student to a festival this summer to do research on NPS, and he couldn't find anyone who was taking any. He had to change his dissertation to "Why aren't people taking NPS?" Classic, illegal drugs were much more appealing. For a lot of people NPSs are an unpleasant substitute.