Feature Request: Keyword-based Wildcard Blocking in Denylist

Hi NextDNS Team,

I've been using NextDNS for a while now and truly appreciate the granular control it offers. However, I believe there is a significant opportunity to improve the Denylist efficiency by introducing Keyword-based Wildcard Blocking.

The Core Issue: Many malicious or unwanted platforms (such as the gambling site "hitclub" in Southeast Asia) employ a "domain rotation" strategy. They constantly switch between hundreds of domains like hitclub.vip, hitclub-123.top, taihitclub.xyz, and hitclub.app.

Currently, adding these manually to the Denylist is an endless "cat and mouse" game. Even with community-maintained filters, there is often a delay between a new domain going live and it being added to global blocklists.

The Proposal: I suggest allowing users to add a keyword with wildcards directly into the Denylist, for example:*hitclub*

This would instruct the DNS to automatically block any query containing that specific string, regardless of the subdomain or Top-Level Domain (TLD).

Why this is a necessary upgrade:

1. Proactive Defense: It blocks brand-new, rotated domains the moment they are created, without waiting for blocklist updates.

2. Reduced Overhead: Users wouldn't need to clutter their Denylist with hundreds of nearly identical entries.

3. Network Efficiency: It provides a cleaner way to handle platforms that intentionally bypass DNS filtering through rapid domain flipping.

This feature would be a powerful tool for users who need to enforce strict domain-naming policies on their networks.

Thank you for your hard work and for considering this improvement!

Best regards