Hate to sound pessimistic to your well-intentioned suggestion, but if someone prefers not to support a creator monthly/regularly, then they are unfortunately choosing not to support them sustainably. I feel strongly that to ask for one-off giving is to ask for a badly designed system. People can't dedicate their output to creating value for you when they're living off a tip-jar. Consistency is the key to backgrounding the profit-motive, and allowing for the creativity you've probably come to appreciate in their work :)
Disclaimer: quit my job to contribute to Gittip community, and have lots of a thoughts and feels on the patron/gratitude economy
Disclaimer: quit my job to contribute to Gittip community, and have lots of a thoughts and feels on the patron/gratitude economy