At least your account is not closed within 1 hour or 6 hours, if your account is closed within 1 hour or 6 hours, it is a sign that you have created a worse account.
If your account is closed within 1 day, you need to change the method. I was interested in mobile api and web and finally decided to go with web. Yes you can communicate faster with mobile api but you need to copy well, especially you need to send EVENTS to Reddit server correctly otherwise they can detect that you are a bot.
At the moment, I can create 500 accounts per day without any problem and my accounts are not closed.
Change your method, always try new things and if you are interested in cyber, see it from a slightly different perspective. I am sure you will find the right way!
Good luck!