Use as inspiration

The Spam protection, Honeypot and Antispam by CleanTalk is getting a lot of good feedback. https://wordpress.org/plugins/cleantalk-spam-protect/
I have heard good things about it. The reason for adding a mention of it here even though I have not yet tried it is that there are likely features in the plugin that can be used as inspiration for Fluent products. Be it Fluent Auth (Security), Fluent Community etc.