4. Freemium With Credit. Many awesome online products allow users to choose from a free version, which includes a watermark or credit line, or the option to upgrade to the paid version, which allows users to remove the mark or replace it with their own logo.
Definition of at the whim of (someone) : when (someone) wishes, desires, or decides something often in a sudden way The shop is only open at the whim of the owner.
In colloquial language and fictional literature, seduction is the process of deliberately enticing a person, to lead astray, as from duty, rectitude, or the like; to corrupt, to persuade or induce to engage in sexual behaviour. The word seduction stems from Latin and means literally to lead astray.