• Tipping / donations — where customers have the option of donating a certain amount to the company. In certain domains, this has proven even more effective than directly charging, but the most successful variations appear to be in domains tied to a good cause and where there is already a monetary transaction happening that you can piggyback on top of.

from Designing Revenue Models | giffconstable.com by Giff Constable

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  • 50 Ways to Be Ridiculously Generous—and Feel Ridiculously Good.

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