I might be taking nonsense, but without a API key that needs to be verified on their servers, font conversations won't be possible. Its this font conversation option what makes this plugin premium. With that said, the Free version, which is downloadable form the WordPress plugins directory can also be activated to be a premium. Would it be safe to say, this plugin cannot be nulled? Just me thoughts.
Just a note. I installed the nulled version and also the free version from the WordPress plugins directory and they both seem to be the same. Perhaps
@datadeba could share what was nulled to make this plugin premium?
I hope not to offend anyone.