Actually, Germany doesn't have a very good reputation amongst international charity organisations. A more reliable source than that crowdfunding (which gained a lot of mainstream media coverage in Germany - which may explain the high numbers) would be the Carities Aid Foundation and particularly their annual World Giving Index reports.
https://www.cafonline.org/publications/2014-publications/world-giving-index-2014.aspx
You'll notice that in 2014 only 48% of germans donated to charity (as opposed to 74% in the UK and Ireland). Even Liberia and Turkmenistan give more than Germany.
Couple that with their position in the nation private savings/ debt statistics (usually top 5 in the black) then shamefully, they really can be judged to be a bit tight.
Eta: i wonder how many donations were made in full knowledge that the'd never reach the target and have to pay up.