Vespucci is not `NonFreeNet`
NonFreeNet
is defined here as promote or depend entirely on a Non-Free network service
.
Vespucci does not promote the non-free servers, they are a means to contribute to OpenStreetMap.
Vespucci can be used perfectly fine with only free imagery sources. The maintainer explicitly confirmed today in OFTC #osm that this is by design. Non-free servers are opt-in.