My setup is a living room setup with 7 webcams (5 C922's, a C920, and a Brio). 3 of these C922's are on their own 32ft USB2.0 active extender (
blue rigger), all operating at max capacity (720p/60fps). The brio (usb3.0 webcam) is also on an active usb3.0 extender to a hub, also running without issue.
Active extenders absolutely do work. Power delivery is usually the main problem, as there has to be enough power delivered to the cable itself to handle the hub functionality, as well as driving what's connected to it. As long as they're being run straight to your computer, and your computer is outputting the required power to the port, it should run without issue.