I do not understand how domains like ɢoogle (with some unicode G-like character) are registered? I remember when IDN were introduced there were concerns about s

I do not understand how domains like ɢoogle (with some unicode G-like character) are registered? I remember when IDN were introduced there were concerns about spoofing similar URLs and there were some restrictions on what characters are allowed. So now the owner of ɢoogle can add a signup form and start phishing for Google Accounts? And I am sure Mr. Trump has no relation to this spam. Obviously it is done to turn people against him.