I've been working for 2 years solely through upwork and I am really happy with it. I get a normal freelancing rate for my country (Australia) and sustain my family with it. I was sceptical at first seeing the low rates but decided to give it a fair try and was happy and surprised with the result. Most often it lead to move the work to outside the platform since their 10% fee can get to big numbers pretty quickly.
Also I'd like to add that some of the companies that I work for have found some great talent through the platform.
Also I'd like to add that some of the companies that I work for have found some great talent through the platform.