I offered to do headshots for people on twitter if they donate a minimum of $5 to The Louise Lawrence Transgender Archives indiegogo campaign. When I did this one it was 25% funded, and only 4 days until it closed. Its set as flexible funding so the more the better rather than hoping to reach a set 'all or nothing' goal; https://www.indiegogo.com/projects/the-louise-lawrence-transgender-archives-history-lgbt--2#/