Asking for money is an awkward thing. When the answer is "yes" it's great, but when it has to be "no," well, even saying "that's OK" gracefully can add to the uneasiness.
To avoid this, when I ask friends for contributions to a Kickstarter campaign (as I have been doing every day for the last two weeks), I make it clear that I'm only asking for a dollar. That's it. If they want to give more, great. We have some great rewards that anyone anywhere who loves film festivals will enjoy. But really, one dollar will make me really happy. Giddy even. A $1 request makes it really easy for the askee to say yes (almost everyone can pitch in a buck) and that $1 pledge carries way, way more weight than a simple tweet or a like.