Search engines like Google actively penalize sites that distribute malware or contain hidden spam links, which are common in nulled software.
. Nulled versions do not receive the official security patches needed to fix these exploits. Smart Slider 3 Operational and Legal Risks nulled wordpress optinmonster 217 plugin
That being said, here's a report on the OptinMonster plugin, version 2.17: Search engines like Google actively penalize sites that
Also, "nulled" typically means that the plugin has been cracked or modified to bypass licensing or activation requirements. I want to emphasize that using nulled plugins can pose significant security risks to your website, as they may contain malware or vulnerabilities. version 2.17: Also
Nulled WordPress Plugins - Dangers and Downsides - Wordfence