You did great Alex.
Have you thought about writing an article explaining why you choose to make the donation and ask on of the EA blogs to publish it? I think a lot of people would find such an article inspiring and share-worthy.
His response to your comment: "I don't know why I chose to donate, I just had an urge to." I then asked him why Against Malaria Foundation? "Because it was top rated on Givewell." I then asked him why Givewell. "Because you (James) said it was a good charity site."
Remember, however, that this isn't any kind of progress thread. Nor is it any kind of proposal thread. This thread is solely for people to talk about the awesome things they have done. Not "will do." Not "are working on." Have already done. This is to cultivate an environment of object level productivity rather than meta-productivity methods. For example:
So, what's the coolest thing you've done this month?
(Previous bragging thread)