One thing I loathe is receiving requests to support a crowdfunded campaign from someone who has never indicated to me that they have taken the time to check out any of the things I have made.
There have been instances where I have supported the crowdfunded campaign of others and gotten zero acknowledgement or thanks.
I have never personally created or marketed such a campaign. I am actually not opposed to doing so and may try it in the future. But I plan to have some ettiquette to the way I go about it, and actually support those that support me.
Here's a form letter I created to respond to the worst offenders.