…preferable in OpenStreetMap as Helge from the NGO Laafi suggests and support development in Africa with unrestricted access to free public maps.
Google basically asks for the same thing, with one small difference: your edits go to Google, and not to Africa:
… By submitting User Submissions to the Service, you give Google a perpetual, irrevocable, worldwide, royalty-free, and non-exclusive license to reproduce, adapt, modify, translate, publish, publicly perform, publicly display, distribute, and create derivative works of the User Submission. …
Terms of Service for Google Map Maker