I'm not sure about the businessdirectory plugin but I can vouch for ACF. The plugin doesn't break if you remove the license key. In fact, you can actually give

I'm not sure about the businessdirectory plugin but I can vouch for ACF. The plugin doesn't break if you remove the license key. In fact, you can actually give someone the pro version's plugin folder and they can use it for free(it just won't be able to update that's all) Perhaps this used to happen in the past but not anymore.