All your data will be anonymized and the whole combined data set of all donations will be shared under OpenDataCommons license.
Those people are data and visualization geeks and create beautiful visualizations like this from the data: http://crowdflow.net/blog/2011/04/28/wifi-stations-in-berlin/
They previously did http://www.zeit.de/datenschutz/malte-spitz-data-retention — a visualization of data retention caused by the german "Vorratsdatenspeicherung".
Please consider donating your location data.
Link to Original Source