Choosing an unauthorized, pirated copy compromises your site's functionality:
Nulled WordPress Plugins & Themes: 6 Risks + Safe ... - Jetpack Nulled Wordpress Optinmonster 2.1.7 Plugin -l
Regarding the specific version you mentioned, OptinMonster 2.1.7, I want to advise that using "nulled" plugins can pose significant security risks to your website. Nulled plugins are often pirated or cracked versions of premium plugins, which can contain malware, backdoors, or other security vulnerabilities. These can compromise your website's integrity, put your users' data at risk, and even lead to financial losses. Choosing an unauthorized
have historically patched critical vulnerabilities, such as flaws that could disclose API keys or allow unauthorized JavaScript injection. Nulled versions do not receive these official security updates, leaving your site permanently exposed. SEO Damage: which can contain malware