Maybe you've noticed that
#OpenStreetMap map tiles are being served very slow in the last few months. The
#OSM tech team has now made clear [1] that any offer for caching servers would be appreciated. If you'd like to support them, see
https://wiki.openstreetmap.org/wiki/Servers/Tile_CDN for more info.
[1]: 🐦
https://twitter.com/OSM_Tech/status/1239573899274334209