In general, paid proxy IPs are of higher quality than free ones. This is because a professional team typically maintains paid proxy IPs and the number of users is limited, so the quality of the IPs remains consistent even as the number of users increases. However, using a free proxy IP can be risky as it is usually not professionally maintained, leading to uncertain quality. If you require a higher-quality proxy IP, consider building your own IP server and hiring professional maintenance pers...