[rmc]

It's not new. MS allows the OSM community to trace from Bing aerial imagery since 2010! And from 2007 till 2011 Yahoo allowed tracing from their aerial imagery. These have been very very helpful to OSM.

https://wiki.openstreetmap.org/wiki/Bing_Maps https://wiki.openstreetmap.org/wiki/Yahoo!_Aerial_Imagery