This addon was initially created for some AMPXF users that have migrated forums and have users with invalid website links:

AMPXF - AMP for Xenforo 2​

* source: Does AMP improve Rankings ** Addons that heavily rely on JavaScript can be problematic AMPXF Boost your forum’s mobile traffic with Accelerated Mobile Pages What is AMP? Accelerated Mobile Pages (AMP) load instantly Search engines...
xenforo.com

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What this addon does:
Adds a website field in ACP > Users > Batch update users

Useful for finding:

• Spammers that have added a website but newer posted anything
• Badly migrated data where field just contains http:// or https://