You can invite a donor to increase their giving iteratively, which means they will base the increase of their future giving on what they have given previously.
Or, you can invite a donor to increase their giving aspirationally, which means they will base the increase of their future giving on what they believe to be a bigger, more meaningful outcome.
If we want to invite more donors to give aspirationally, we must realize that the most important part of the invitation is not to ask for the gift.
It’s to help them see the need for the gift in the first place.