Pipes where awesome! The product seemed to have influenced a few products (off the top of my head): 1. IBM's Node Red [1] 2. AWS IoT Things Graph [2] I'm sure there are others? [1] https://nodered.org/ [2] https://aws.amazon.com/iot-things-graph/?nc=sn&loc=3&dn=6
Though not exactly the same thing, I like to think of these as spiritual successors: https://ifttt.com/ https://zapier.com/
In many ways Pipes was far too ahead of its time. The Web simply did not have as much computation and reason for integrating data between different web apps at the time.