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.
The tippee is the person who knowingly uses such information to make a trade (in turn also breaking his or her confidentiality). Both parties typically do so for a mutual monetary benefit. A tipper could be the spouse of a CEO who goes ahead and tells his neighbor inside information.