You can prefix the links (https:// , www.) in the prohibited words and the site will automatically ignore them. In addition, I advise you to use one of the plug-ins for blocking spam, it has options to control the number of links that can be included in each answer or comment, and I think it contains another option to block all links in general.
Usually these fake accounts and links are created by a bot, so when you put an plug-in to prevent spam, these accounts and these links will drop very dramatically, as happened to me, I suffered from this issue a lot in the past.
Akismet Plugin by Dave Hannon. Uses to spam filtering service to detect spammy posts and queue them for moderation.