rails-girls-summer-of-code/rgsoc-campaign — pull request #25 by starkcoffee (2014-05-05 12:13:23+00:00)
Title: Add encrypted donation params to link

So with 3rd party cookies disabled can click on the link and the donation gets created then.

For users who have 3rd party cookies enabled, the pingback image request will work. Givie checks the uid so donations aren't created on Givie twice.