Reposted, for some reason my original post has disappeared.
We are currently using the Mapquest OSM Tiles (served from https://otile1-s.mqcdn/tiles/1.0.0/map) in a couple of projects.
Having just read your latest blog post about changes to your Free & Open License, can you confirm if this will affect our usage of the tiles? We don’t currently have a Mapquest API key of any type, as we just use the tiles, not any of the services.
Please can you advise.