We also need to be careful as some of the people are real. In my case I actually video chatted with the person so they are not always using other people pictures... you may also talk to the person themselves.
True but if you look closely, the people that victims video chatted are way off from the pictures they sent you. If you start asking them why it looks so different they'll tell you that they used a lot of filters on those pics because lots of girls want to appear prettier. Also, those people who do video chat are usually the call is quick and in a very low light setting, then blame that the connection is not that great and all that kind of excuses.
Imagine you as a scammer and video chatting will definitely expose themselves and they are afraid that you are recording them. So most likely the pictures that they used are stolen from mid level Chinese social influencers. Real scammers wont be exposing themselves like that on pictures, they know Chinese law punishment can be a death row sentence. They are stupid but not that careless.