You will not increase security/privacy when using Tor/.onion as much as you are more likely to be scammed.
All platforms that require proof of identity (KYC/AL) will not use Darknet URLs.
I am quite confident that your first statement is wrong, you seem to not have any knowledge on how things work server-side.
Using Tor DOES increase security and privacy in case you know what you are doing and I am not going to elaborate this subject here, because you could obtain a lot of relevant information on
https://torproject.org regarding internet privacy and much more things. Please read everything carefully in order to not spread misinformation next time.
Also, mentioning Tor addresses as "darknet URLs" is quite misleading. A platform that is concerned about users privacy could have clearnet and Tor addresses, because there is nothing wrong giving a user a possibility to hide his real IP address. Platforms that use IP addresses for security measures of preventing account intrusion are literally doing it bad and should be never trusted, this is a very lame way to go.
Anyway thanks all the posters, I've already found some exchanges that at least don't track the IP addresses for security measures and don't block Tor.
