Earlier quoted context omitted.
There are lots of usecases for apps that don't need these advanced features, and just want a nice backdrop for their geo data. The current offerings of google, mapbox, bing, etc are prohibitively expensive when you just need a small subset of their features. The company I work for is a happy customer of maptiler.com which even offers routing and reverse geocoding. It might not be as great and up to date as google's,…
In this case you should just use Leaflet and OpenStreetMap for a grand total of $0 per month.
> However, OpenStreetMap’s own servers are run entirely on donated resources. They have strictly limited capacity. Heavy use of OSM tiles adversely affects people’s ability to edit the map, and is an abuse of the individual donations and sponsorship which provide hardware and bandwidth. As a result, we require that users of the tiles abide by this tile usage policy.